diff --git a/src/app/dialogs/tools/dialogtriangle.cpp b/src/app/dialogs/tools/dialogtriangle.cpp
index 66445f613..5383350d7 100644
--- a/src/app/dialogs/tools/dialogtriangle.cpp
+++ b/src/app/dialogs/tools/dialogtriangle.cpp
@@ -30,6 +30,8 @@
 #include "ui_dialogtriangle.h"
 #include "../../geometry/vpointf.h"
 #include "../../container/vcontainer.h"
+#include "../../visualization/vistooltriangle.h"
+#include "../../widgets/vmaingraphicsscene.h"
 
 //---------------------------------------------------------------------------------------------------------------------
 /**
@@ -39,12 +41,12 @@
  */
 DialogTriangle::DialogTriangle(const VContainer *data, const quint32 &toolId, QWidget *parent)
     :DialogTool(data, toolId, parent), ui(new Ui::DialogTriangle), number(0), pointName(QString()), axisP1Id(0),
-    axisP2Id(0), firstPointId(0), secondPointId(0)
+    axisP2Id(0), firstPointId(0), secondPointId(0), line (nullptr)
 {
     ui->setupUi(this);
     labelEditNamePoint = ui->labelEditNamePoint;
 
-    InitOkCancel(ui);
+    InitOkCancelApply(ui);
     flagName = false;
     CheckState();
 
@@ -62,11 +64,14 @@ DialogTriangle::DialogTriangle(const VContainer *data, const quint32 &toolId, QW
             this, &DialogTriangle::PointNameChanged);
     connect(ui->comboBoxAxisP2, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogTriangle::PointNameChanged);
+
+    line = new VisToolTriangle(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogTriangle::~DialogTriangle()
 {
+    delete line;
     delete ui;
 }
 
@@ -86,21 +91,29 @@ void DialogTriangle::ChosenObject(quint32 id, const SceneObject &type)
             case (0):
                 ChangeCurrentText(ui->comboBoxAxisP1, point->name());
                 number++;
+                line->VisualMode(id);
                 emit ToolTip(tr("Select second point of axis"));
                 break;
             case (1):
                 ChangeCurrentText(ui->comboBoxAxisP2, point->name());
                 number++;
+                line->setPoint2Id(id);
+                line->RefreshGeometry();
                 emit ToolTip(tr("Select first point"));
                 break;
             case (2):
                 ChangeCurrentText(ui->comboBoxFirstPoint, point->name());
                 number++;
+                line->setHypotenuseP1Id(id);
+                line->RefreshGeometry();
                 emit ToolTip(tr("Select second point"));
                 break;
             case (3):
                 ChangeCurrentText(ui->comboBoxSecondPoint, point->name());
                 number = 0;
+                line->setHypotenuseP2Id(id);
+                line->RefreshGeometry();
+                prepare = true;
                 emit ToolTip(tr(""));
                 if (isInitialized == false)
                 {
@@ -122,6 +135,12 @@ void DialogTriangle::SaveData()
     secondPointId = getCurrentObjectId(ui->comboBoxSecondPoint);
     axisP1Id = getCurrentObjectId(ui->comboBoxAxisP1);
     axisP2Id = getCurrentObjectId(ui->comboBoxAxisP2);
+
+    line->setPoint1Id(axisP1Id);
+    line->setPoint2Id(axisP2Id);
+    line->setHypotenuseP1Id(firstPointId);
+    line->setHypotenuseP2Id(secondPointId);
+    line->RefreshGeometry();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -134,7 +153,7 @@ void DialogTriangle::PointNameChanged()
     set.insert(getCurrentObjectId(ui->comboBoxAxisP2));
 
     QColor color = okColor;
-    if (set.size() != 4)
+    if (set.size() < 3)//Need tree or more unique points for creation triangle
     {
         flagError = false;
         color = errorColor;
@@ -151,6 +170,18 @@ void DialogTriangle::PointNameChanged()
     CheckState();
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void DialogTriangle::ShowVisualization()
+{
+    if (prepare == false)
+    {
+        VMainGraphicsScene *scene = qApp->getCurrentScene();
+        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisLine::SetFactor);
+        scene->addItem(line);
+        line->RefreshGeometry();
+    }
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief setPointName set name of point
@@ -170,6 +201,7 @@ void DialogTriangle::setPointName(const QString &value)
 void DialogTriangle::setSecondPointId(const quint32 &value)
 {
     setPointId(ui->comboBoxSecondPoint, secondPointId, value);
+    line->setHypotenuseP2Id(secondPointId);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -180,6 +212,7 @@ void DialogTriangle::setSecondPointId(const quint32 &value)
 void DialogTriangle::setFirstPointId(const quint32 &value)
 {
     setPointId(ui->comboBoxFirstPoint, firstPointId, value);
+    line->setHypotenuseP1Id(firstPointId);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -190,6 +223,7 @@ void DialogTriangle::setFirstPointId(const quint32 &value)
 void DialogTriangle::setAxisP2Id(const quint32 &value)
 {
     setPointId(ui->comboBoxAxisP2, axisP2Id, value);
+    line->setPoint2Id(axisP2Id);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -200,4 +234,5 @@ void DialogTriangle::setAxisP2Id(const quint32 &value)
 void DialogTriangle::setAxisP1Id(const quint32 &value)
 {
     setPointId(ui->comboBoxAxisP1, axisP1Id, value);
+    line->setPoint1Id(axisP1Id);
 }
diff --git a/src/app/dialogs/tools/dialogtriangle.h b/src/app/dialogs/tools/dialogtriangle.h
index 256c58d4a..5c0828e1e 100644
--- a/src/app/dialogs/tools/dialogtriangle.h
+++ b/src/app/dialogs/tools/dialogtriangle.h
@@ -36,6 +36,8 @@ namespace Ui
     class DialogTriangle;
 }
 
+class VisToolTriangle;
+
 /**
  * @brief The DialogTriangle class dialog for ToolTriangle. Help create point and edit option.
  */
@@ -64,6 +66,7 @@ public slots:
     virtual void   ChosenObject(quint32 id, const SceneObject &type);
     virtual void   PointNameChanged();
 protected:
+    virtual void   ShowVisualization();
     /**
      * @brief SaveData Put dialog data in local variables
      */
@@ -91,6 +94,8 @@ private:
 
     /** @brief secondPointId id second point of line */
     quint32         secondPointId;
+
+    VisToolTriangle *line;
 };
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialogtriangle.ui b/src/app/dialogs/tools/dialogtriangle.ui
index 0a5f3223f..4ac997de3 100644
--- a/src/app/dialogs/tools/dialogtriangle.ui
+++ b/src/app/dialogs/tools/dialogtriangle.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>267</width>
+    <width>285</width>
     <height>220</height>
    </rect>
   </property>
@@ -82,6 +82,12 @@
     <layout class="QHBoxLayout" name="horizontalLayout_5">
      <item>
       <widget class="QLabel" name="labelAxisP1">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
        <property name="text">
         <string>First point of axis</string>
        </property>
@@ -100,6 +106,12 @@
     <layout class="QHBoxLayout" name="horizontalLayout_6">
      <item>
       <widget class="QLabel" name="labelAxisP2">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
        <property name="text">
         <string>Second point of axis</string>
        </property>
@@ -118,6 +130,12 @@
     <layout class="QHBoxLayout" name="horizontalLayout_7">
      <item>
       <widget class="QLabel" name="labelFirstPoint">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
        <property name="text">
         <string>First point</string>
        </property>
@@ -136,6 +154,12 @@
     <layout class="QHBoxLayout" name="horizontalLayout_8">
      <item>
       <widget class="QLabel" name="labelSecondPoint">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
        <property name="text">
         <string>Second point</string>
        </property>
@@ -156,7 +180,7 @@
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="standardButtons">
-      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+      <set>QDialogButtonBox::Apply|QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
      </property>
     </widget>
    </item>
diff --git a/src/app/mainwindow.cpp b/src/app/mainwindow.cpp
index e671b8050..a25eee5d3 100644
--- a/src/app/mainwindow.cpp
+++ b/src/app/mainwindow.cpp
@@ -580,8 +580,10 @@ void MainWindow::ToolHeight(bool checked)
  */
 void MainWindow::ToolTriangle(bool checked)
 {
-    SetToolButton<DialogTriangle>(checked, Tool::Triangle, ":/cursor/triangle_cursor.png",
-                                  tr("Select first point of axis"), &MainWindow::ClosedDialog<VToolTriangle>);
+    SetToolButtonWithApply<DialogTriangle>(checked, Tool::Triangle, ":/cursor/triangle_cursor.png",
+                                           tr("Select first point of axis"),
+                                           &MainWindow::ClosedDialogWithApply<VToolTriangle>,
+                                           &MainWindow::ApplyDialog<VToolTriangle>);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/tools/drawTools/vtooltriangle.cpp b/src/app/tools/drawTools/vtooltriangle.cpp
index 3bb91e32a..38486eff1 100644
--- a/src/app/tools/drawTools/vtooltriangle.cpp
+++ b/src/app/tools/drawTools/vtooltriangle.cpp
@@ -30,6 +30,8 @@
 #include "../../dialogs/tools/dialogtriangle.h"
 #include "../../geometry/vpointf.h"
 
+#include <QtMath>
+
 const QString VToolTriangle::ToolType = QStringLiteral("triangle");
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -86,8 +88,9 @@ void VToolTriangle::setDialog()
  * @param scene pointer to scene.
  * @param doc dom document container.
  * @param data container with variables.
+ * @return the created tool
  */
-void VToolTriangle::Create(DialogTool *dialog, VMainGraphicsScene *scene, VPattern *doc, VContainer *data)
+VToolTriangle* VToolTriangle::Create(DialogTool *dialog, VMainGraphicsScene *scene, VPattern *doc, VContainer *data)
 {
     SCASSERT(dialog != nullptr);
     DialogTriangle *dialogTool = qobject_cast<DialogTriangle*>(dialog);
@@ -97,8 +100,14 @@ void VToolTriangle::Create(DialogTool *dialog, VMainGraphicsScene *scene, VPatte
     const quint32 firstPointId = dialogTool->getFirstPointId();
     const quint32 secondPointId = dialogTool->getSecondPointId();
     const QString pointName = dialogTool->getPointName();
-    Create(0, pointName, axisP1Id, axisP2Id, firstPointId, secondPointId, 5, 10, scene, doc, data,
-           Document::FullParse, Source::FromGui);
+    VToolTriangle* point = nullptr;
+    point = Create(0, pointName, axisP1Id, axisP2Id, firstPointId, secondPointId, 5, 10, scene, doc, data,
+                   Document::FullParse, Source::FromGui);
+    if (point != nullptr)
+    {
+        point->dialog=dialogTool;
+    }
+    return point;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -117,11 +126,12 @@ void VToolTriangle::Create(DialogTool *dialog, VMainGraphicsScene *scene, VPatte
  * @param data container with variables.
  * @param parse parser file mode.
  * @param typeCreation way we create this tool.
+ * @return the created tool
  */
-void VToolTriangle::Create(const quint32 _id, const QString &pointName, const quint32 &axisP1Id,
-                           const quint32 &axisP2Id, const quint32 &firstPointId, const quint32 &secondPointId,
-                           const qreal &mx, const qreal &my, VMainGraphicsScene *scene, VPattern *doc,
-                           VContainer *data, const Document &parse, const Source &typeCreation)
+VToolTriangle* VToolTriangle::Create(const quint32 _id, const QString &pointName, const quint32 &axisP1Id,
+                                     const quint32 &axisP2Id, const quint32 &firstPointId, const quint32 &secondPointId,
+                                     const qreal &mx, const qreal &my, VMainGraphicsScene *scene, VPattern *doc,
+                                     VContainer *data, const Document &parse, const Source &typeCreation)
 {
     const VPointF *axisP1 = data->GeometricObject<const VPointF *>(axisP1Id);
     const VPointF *axisP2 = data->GeometricObject<const VPointF *>(axisP2Id);
@@ -157,7 +167,9 @@ void VToolTriangle::Create(const quint32 _id, const QString &pointName, const qu
         doc->IncrementReferens(axisP2Id);
         doc->IncrementReferens(firstPointId);
         doc->IncrementReferens(secondPointId);
+        return point;
     }
+    return nullptr;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -172,39 +184,31 @@ void VToolTriangle::Create(const quint32 _id, const QString &pointName, const qu
 QPointF VToolTriangle::FindPoint(const QPointF &axisP1, const QPointF &axisP2, const QPointF &firstPoint,
                                  const QPointF &secondPoint)
 {
-    qreal c = QLineF(firstPoint, secondPoint).length();
-    qreal a = QLineF(axisP2, firstPoint).length();
-    qreal b = QLineF(axisP2, secondPoint).length();
-    if (fabs(c*c - (a*a + b*b)) < 0.0001)
+    QLineF axis(axisP1, axisP2);
+    QLineF hypotenuse(firstPoint, secondPoint);
+
+    QPointF startPoint;
+    QLineF::IntersectType intersect = axis.intersect(hypotenuse, &startPoint);
+    if (intersect != QLineF::UnboundedIntersection && intersect != QLineF::BoundedIntersection)
     {
-        QLineF l1(axisP2, firstPoint);
-        QLineF l2(axisP2, secondPoint);
-        if (fabs(l1.angleTo(l2) - 90) < 0.1 || fabs(l2.angleTo(l1) - 90) < 0.1)
-        {
-            return axisP2;
-        }
+        return QPointF();
     }
 
-    QLineF line = QLineF(axisP1, axisP2);
-    qreal step = 0.01;
+    qreal step = 1;
+
+    QLineF line;
+    line.setP1(startPoint);
+    line.setAngle(axis.angle());
+    line.setLength(step);
+
+    int c = qFloor(hypotenuse.length());
     while (1)
     {
         line.setLength(line.length()+step);
-        a = QLineF(line.p2(), firstPoint).length();
-        b = QLineF(line.p2(), secondPoint).length();
-        if (qFuzzyCompare(c*c, a*a + b*b))
+        int a = qFloor(QLineF(line.p2(), firstPoint).length());
+        int b = qFloor(QLineF(line.p2(), secondPoint).length());
+        if (c*c <= (a*a + b*b))
         {
-            QLineF l1(axisP2, firstPoint);
-            QLineF l2(axisP2, secondPoint);
-            if (fabs(l1.angleTo(l2) - 90) < 0.1 || fabs(l2.angleTo(l1) - 90) < 0.1)
-            {
-                return line.p2();
-            }
-        }
-        if (c*c < a*a + b*b)
-        {
-            //Still don't know why this code handled. Need to think about that.
-            qDebug()<<"Can't find point."<<Q_FUNC_INFO;
             return line.p2();
         }
     }
diff --git a/src/app/tools/drawTools/vtooltriangle.h b/src/app/tools/drawTools/vtooltriangle.h
index 1300aae3c..f845c4786 100644
--- a/src/app/tools/drawTools/vtooltriangle.h
+++ b/src/app/tools/drawTools/vtooltriangle.h
@@ -32,7 +32,8 @@
 #include "vtoolpoint.h"
 
 /**
- * @brief The VToolTriangle class tool for what find point intersection two foots right triangle.
+ * @brief The VToolTriangle class for tool that find point intersection two foots right triangle
+ * (triangle with 90 degree).
  */
 class VToolTriangle : public VToolPoint
 {
@@ -42,11 +43,11 @@ public:
                   const quint32 &firstPointId, const quint32 &secondPointId, const Source &typeCreation,
                   QGraphicsItem * parent = nullptr);
     virtual void   setDialog();
-    static void    Create(DialogTool *dialog, VMainGraphicsScene  *scene, VPattern *doc, VContainer *data);
-    static void    Create(const quint32 _id, const QString &pointName, const quint32 &axisP1Id, const quint32 &axisP2Id,
-                          const quint32 &firstPointId, const quint32 &secondPointId, const qreal &mx, const qreal &my,
-                          VMainGraphicsScene *scene, VPattern *doc, VContainer *data,
-                          const Document &parse, const Source &typeCreation);
+    static VToolTriangle *Create(DialogTool *dialog, VMainGraphicsScene  *scene, VPattern *doc, VContainer *data);
+    static VToolTriangle *Create(const quint32 _id, const QString &pointName, const quint32 &axisP1Id,
+                                 const quint32 &axisP2Id, const quint32 &firstPointId, const quint32 &secondPointId,
+                                 const qreal &mx, const qreal &my, VMainGraphicsScene *scene, VPattern *doc,
+                                 VContainer *data, const Document &parse, const Source &typeCreation);
     static QPointF FindPoint(const QPointF &axisP1, const QPointF &axisP2, const QPointF &firstPoint,
                              const QPointF &secondPoint);
     static const QString ToolType;
diff --git a/src/app/visualization/visline.cpp b/src/app/visualization/visline.cpp
index 7b03dcbd5..3e65839da 100644
--- a/src/app/visualization/visline.cpp
+++ b/src/app/visualization/visline.cpp
@@ -28,7 +28,6 @@
 
 #include "visline.h"
 #include "../container/vcontainer.h"
-#include "../widgets/vapplication.h"
 #include "../tools/drawTools/vdrawtool.h"
 #include "../container/calculator.h"
 
@@ -162,6 +161,7 @@ void VisLine::DrawPoint(QGraphicsEllipseItem *point, const QPointF &pos, const Q
 
     point->setPos(pos);
     point->setPen(QPen(color, qApp->toPixel(qApp->widthMainLine())/factor));
+    point->setVisible(true);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -183,19 +183,11 @@ QGraphicsEllipseItem *VisLine::InitPoint(const QColor &color)
     point->setPen(QPen(color, qApp->toPixel(qApp->widthMainLine())/factor));
     point->setRect(PointRect());
     point->setFlags(QGraphicsItem::ItemStacksBehindParent);
+    point->setVisible(false);
     return point;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-QGraphicsLineItem *VisLine::InitLine(const QColor &color)
-{
-    QGraphicsLineItem *line = new QGraphicsLineItem(this);
-    line->setPen(QPen(color, qApp->toPixel(qApp->widthHairLine())/factor));
-    line->setZValue(1);
-    line->setFlags(QGraphicsItem::ItemStacksBehindParent);
-    return line;
-}
-
 qreal VisLine::CorrectAngle(const qreal &angle) const
 {
     qreal ang = angle;
@@ -291,3 +283,18 @@ void VisLine::setPoint1Id(const quint32 &value)
 {
     point1Id = value;
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+QLineF VisLine::Axis(const QPointF &p, const qreal &angle) const
+{
+    QPointF endP1 = Ray(p, angle+180);
+    QPointF endP2 = Ray(p, angle);
+    return QLineF(endP1, endP2);
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+QLineF VisLine::Axis(const QPointF &p1, const QPointF &p2) const
+{
+    QLineF line(p1, p2);
+    return Axis(p1, line.angle());
+}
diff --git a/src/app/visualization/visline.h b/src/app/visualization/visline.h
index e9ff543ae..516bd771b 100644
--- a/src/app/visualization/visline.h
+++ b/src/app/visualization/visline.h
@@ -33,6 +33,8 @@
 #include <QGraphicsLineItem>
 #include <QPointF>
 
+#include "../widgets/vapplication.h"
+
 class VContainer;
 
 class VisLine: public QObject, public QGraphicsLineItem
@@ -71,11 +73,21 @@ protected:
     QLineF       Line(const QPointF &p1, const qreal& length, const qreal &angle);
 
     QGraphicsEllipseItem *InitPoint(const QColor &color);
-    QGraphicsLineItem    *InitLine(const QColor &color);
+    template <class Item>
+    Item         *InitItem(const QColor &color)
+    {
+        Item *item = new Item(this);
+        item->setPen(QPen(color, qApp->toPixel(qApp->widthHairLine())/factor));
+        item->setZValue(1);
+        item->setFlags(QGraphicsItem::ItemStacksBehindParent);
+        return item;
+    }
 
     qreal        CorrectAngle(const qreal &angle) const;
     QPointF      Ray(const QPointF &firstPoint, const qreal &angle) const;
     QPointF      Ray(const QPointF &firstPoint) const;
+    QLineF       Axis(const QPointF &p, const qreal &angle) const;
+    QLineF       Axis(const QPointF &p1, const QPointF &p2) const;
 private:
     Q_DISABLE_COPY(VisLine)
 };
diff --git a/src/app/visualization/vistoolalongline.cpp b/src/app/visualization/vistoolalongline.cpp
index 16e7478b8..88d35c31f 100644
--- a/src/app/visualization/vistoolalongline.cpp
+++ b/src/app/visualization/vistoolalongline.cpp
@@ -29,7 +29,6 @@
 #include "vistoolalongline.h"
 #include "../container/vcontainer.h"
 #include "../geometry/vpointf.h"
-#include "../widgets/vapplication.h"
 
 //---------------------------------------------------------------------------------------------------------------------
 VisToolAlongLine::VisToolAlongLine(const VContainer *data, QGraphicsItem *parent)
@@ -40,7 +39,7 @@ VisToolAlongLine::VisToolAlongLine(const VContainer *data, QGraphicsItem *parent
 
     lineP1 = InitPoint(supportColor);
     lineP2 = InitPoint(supportColor);
-    line = InitLine(supportColor);
+    line = InitItem<QGraphicsLineItem>(supportColor);
     point = InitPoint(mainColor);
 }
 
diff --git a/src/app/visualization/vistoolbisector.cpp b/src/app/visualization/vistoolbisector.cpp
index c1cd58386..c9f374aa9 100644
--- a/src/app/visualization/vistoolbisector.cpp
+++ b/src/app/visualization/vistoolbisector.cpp
@@ -38,10 +38,10 @@ VisToolBisector::VisToolBisector(const VContainer *data, QGraphicsItem *parent)
 {
     line1P1 = InitPoint(supportColor);
     line1P2 = InitPoint(supportColor);
-    line1 = InitLine(supportColor);
+    line1 = InitItem<QGraphicsLineItem>(supportColor);
 
     line2P2 = InitPoint(supportColor);
-    line2 = InitLine(supportColor);
+    line2 = InitItem<QGraphicsLineItem>(supportColor);
 
     point = InitPoint(mainColor);
 }
diff --git a/src/app/visualization/vistoolendline.cpp b/src/app/visualization/vistoolendline.cpp
index ae229dd9f..dbd80ad7c 100644
--- a/src/app/visualization/vistoolendline.cpp
+++ b/src/app/visualization/vistoolendline.cpp
@@ -29,7 +29,6 @@
 #include "vistoolendline.h"
 #include "../geometry/vpointf.h"
 #include "../container/vcontainer.h"
-#include "../widgets/vapplication.h"
 #include "../tools/vabstracttool.h"
 
 #include <QGraphicsScene>
diff --git a/src/app/visualization/vistoolheight.cpp b/src/app/visualization/vistoolheight.cpp
index 8c340b4df..bde4a5c92 100644
--- a/src/app/visualization/vistoolheight.cpp
+++ b/src/app/visualization/vistoolheight.cpp
@@ -38,8 +38,8 @@ VisToolHeight::VisToolHeight(const VContainer *data, QGraphicsItem *parent)
     base_point = InitPoint(supportColor);
     lineP1 = InitPoint(supportColor);
     lineP2 = InitPoint(supportColor);
-    line = InitLine(supportColor);
-    line_intersection = InitLine(supportColor);
+    line = InitItem<QGraphicsLineItem>(supportColor);
+    line_intersection = InitItem<QGraphicsLineItem>(supportColor);
 
     point = InitPoint(mainColor);
 }
diff --git a/src/app/visualization/vistoolline.cpp b/src/app/visualization/vistoolline.cpp
index f799b5cbc..7732af60a 100644
--- a/src/app/visualization/vistoolline.cpp
+++ b/src/app/visualization/vistoolline.cpp
@@ -29,7 +29,6 @@
 #include "vistoolline.h"
 #include "../container/vcontainer.h"
 #include "../geometry/vpointf.h"
-#include "../widgets/vapplication.h"
 #include "../tools/drawTools/vdrawtool.h"
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/visualization/vistoolnormal.cpp b/src/app/visualization/vistoolnormal.cpp
index fe27b0dc0..68f858759 100644
--- a/src/app/visualization/vistoolnormal.cpp
+++ b/src/app/visualization/vistoolnormal.cpp
@@ -39,7 +39,7 @@ VisToolNormal::VisToolNormal(const VContainer *data, QGraphicsItem *parent)
 
     lineP1 = InitPoint(supportColor);
     lineP2 = InitPoint(supportColor);
-    line = InitLine(supportColor);
+    line = InitItem<QGraphicsLineItem>(supportColor);
 
     point = InitPoint(mainColor);
 }
diff --git a/src/app/visualization/vistoolpointofintersection.cpp b/src/app/visualization/vistoolpointofintersection.cpp
index ea0684e70..397e7ed43 100644
--- a/src/app/visualization/vistoolpointofintersection.cpp
+++ b/src/app/visualization/vistoolpointofintersection.cpp
@@ -36,7 +36,7 @@ VisToolPointOfIntersection::VisToolPointOfIntersection(const VContainer *data, Q
 {
     axisP1 = InitPoint(supportColor);
     axisP2 = InitPoint(supportColor);
-    axis2 = InitLine(supportColor);
+    axis2 = InitItem<QGraphicsLineItem>(supportColor);
 
     point = InitPoint(mainColor);
 }
@@ -78,14 +78,6 @@ void VisToolPointOfIntersection::setPoint2Id(const quint32 &value)
     point2Id = value;
 }
 
-//---------------------------------------------------------------------------------------------------------------------
-QLineF VisToolPointOfIntersection::Axis(const QPointF &p, const qreal &angle) const
-{
-    QPointF endP1 = Ray(p, angle);
-    QPointF endP2 = Ray(p, angle+180);
-    return QLineF(endP1, endP2);
-}
-
 //---------------------------------------------------------------------------------------------------------------------
 void VisToolPointOfIntersection::ShowIntersection(const QLineF &axis1, const QLineF &axis2)
 {
diff --git a/src/app/visualization/vistoolpointofintersection.h b/src/app/visualization/vistoolpointofintersection.h
index 291f7802a..e17c1ee05 100644
--- a/src/app/visualization/vistoolpointofintersection.h
+++ b/src/app/visualization/vistoolpointofintersection.h
@@ -49,7 +49,6 @@ private:
     QGraphicsEllipseItem *axisP2;
     QGraphicsLineItem    *axis2;//axis1 is class themself
 
-    QLineF       Axis(const QPointF &p, const qreal &angle) const;
     void         ShowIntersection(const QLineF &axis1, const QLineF &axis2);
 };
 
diff --git a/src/app/visualization/vistoolshoulderpoint.cpp b/src/app/visualization/vistoolshoulderpoint.cpp
index af7864228..d2f866aee 100644
--- a/src/app/visualization/vistoolshoulderpoint.cpp
+++ b/src/app/visualization/vistoolshoulderpoint.cpp
@@ -37,11 +37,11 @@ VisToolShoulderPoint::VisToolShoulderPoint(const VContainer *data, QGraphicsItem
 {
     line1P1 = InitPoint(supportColor);
     line1P2 = InitPoint(supportColor);
-    line1 = InitLine(supportColor);
+    line1 = InitItem<QGraphicsLineItem>(supportColor);
 
     line2P2 = InitPoint(supportColor);
-    line2 = InitLine(supportColor);
-    line3 = InitLine(supportColor);
+    line2 = InitItem<QGraphicsLineItem>(supportColor);
+    line3 = InitItem<QGraphicsLineItem>(supportColor);
 
     point = InitPoint(mainColor);
 }
diff --git a/src/app/visualization/vistooltriangle.cpp b/src/app/visualization/vistooltriangle.cpp
new file mode 100644
index 000000000..d86108c9e
--- /dev/null
+++ b/src/app/visualization/vistooltriangle.cpp
@@ -0,0 +1,183 @@
+/************************************************************************
+ **
+ **  @file   vistooltriangle.cpp
+ **  @author Roman Telezhynskyi <dismine(at)gmail.com>
+ **  @date   13 8, 2014
+ **
+ **  @brief
+ **  @copyright
+ **  This source code is part of the Valentine project, a pattern making
+ **  program, whose allow create and modeling patterns of clothing.
+ **  Copyright (C) 2014 Valentina project
+ **  <https://bitbucket.org/dismine/valentina> All Rights Reserved.
+ **
+ **  Valentina is free software: you can redistribute it and/or modify
+ **  it under the terms of the GNU General Public License as published by
+ **  the Free Software Foundation, either version 3 of the License, or
+ **  (at your option) any later version.
+ **
+ **  Valentina is distributed in the hope that it will be useful,
+ **  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ **  GNU General Public License for more details.
+ **
+ **  You should have received a copy of the GNU General Public License
+ **  along with Valentina.  If not, see <http://www.gnu.org/licenses/>.
+ **
+ *************************************************************************/
+
+#include "vistooltriangle.h"
+#include "../geometry/vpointf.h"
+#include "../container/vcontainer.h"
+#include "../tools/drawTools/vtooltriangle.h"
+#include "QtMath"
+
+//---------------------------------------------------------------------------------------------------------------------
+VisToolTriangle::VisToolTriangle(const VContainer *data, QGraphicsItem *parent)
+    :VisLine(data, parent), point2Id(0), hypotenuseP1Id(0), hypotenuseP2Id(0), point(nullptr), axisP1(nullptr),
+      axisP2(nullptr), axis(nullptr), hypotenuseP1(nullptr), hypotenuseP2(nullptr), foot1(nullptr), foot2(nullptr)
+{
+    axisP1 = InitPoint(supportColor);
+    axisP2 = InitPoint(supportColor);
+    axis = InitItem<QGraphicsPathItem>(supportColor);
+    hypotenuseP1 = InitPoint(supportColor);
+    hypotenuseP2 = InitPoint(supportColor);
+    foot1 = InitItem<QGraphicsLineItem>(supportColor);
+    foot2 = InitItem<QGraphicsLineItem>(supportColor);
+
+    point = InitPoint(mainColor);
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+VisToolTriangle::~VisToolTriangle()
+{}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VisToolTriangle::RefreshGeometry()
+{
+    if (point1Id > 0)
+    {
+        const VPointF *first = data->GeometricObject<const VPointF *>(point1Id);
+        DrawPoint(axisP1, first->toQPointF(), supportColor);
+
+        if (point2Id <= 0)
+        {
+            DrawAimedAxis(axis, QLineF(first->toQPointF(), scenePos), supportColor);
+        }
+        else
+        {
+            const VPointF *second = data->GeometricObject<const VPointF *>(point2Id);
+            DrawPoint(axisP2, second->toQPointF(), supportColor);
+
+            DrawAimedAxis(axis, QLineF(first->toQPointF(), second->toQPointF()), supportColor);
+
+            if (hypotenuseP1Id <= 0)
+            {
+                return;
+            }
+            else
+            {
+                const VPointF *third = data->GeometricObject<const VPointF *>(hypotenuseP1Id);
+                DrawPoint(hypotenuseP1, third->toQPointF(), supportColor);
+
+                if (hypotenuseP2Id <= 0)
+                {
+                    DrawLine(this, QLineF(third->toQPointF(), scenePos), supportColor, Qt::DashLine);
+
+                    QPointF trPoint = VToolTriangle::FindPoint(first->toQPointF(), second->toQPointF(),
+                                                               third->toQPointF(), scenePos);
+                    DrawPoint(point, trPoint, mainColor);
+
+                    DrawLine(foot1, QLineF(third->toQPointF(), trPoint), supportColor, Qt::DashLine);
+                    DrawLine(foot2, QLineF(scenePos, trPoint), supportColor, Qt::DashLine);
+                }
+                else
+                {
+                    const VPointF *forth = data->GeometricObject<const VPointF *>(hypotenuseP2Id);
+                    DrawPoint(hypotenuseP2, forth->toQPointF(), supportColor);
+
+                    DrawLine(this, QLineF(third->toQPointF(), forth->toQPointF()), supportColor, Qt::DashLine);
+
+                    QPointF trPoint = VToolTriangle::FindPoint(first->toQPointF(), second->toQPointF(),
+                                                               third->toQPointF(), forth->toQPointF());
+                    DrawPoint(point, trPoint, mainColor);
+
+                    DrawLine(foot1, QLineF(third->toQPointF(), trPoint), supportColor, Qt::DashLine);
+                    DrawLine(foot2, QLineF(forth->toQPointF(), trPoint), supportColor, Qt::DashLine);
+                }
+            }
+        }
+    }
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VisToolTriangle::setPoint2Id(const quint32 &value)
+{
+    point2Id = value;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VisToolTriangle::setHypotenuseP1Id(const quint32 &value)
+{
+    hypotenuseP1Id = value;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VisToolTriangle::setHypotenuseP2Id(const quint32 &value)
+{
+    hypotenuseP2Id = value;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VisToolTriangle::DrawAimedAxis(QGraphicsPathItem *item, const QLineF &line, const QColor &color,
+                                    Qt::PenStyle style)
+{
+    SCASSERT (item != nullptr);
+
+    item->setPen(QPen(color, qApp->toPixel(qApp->widthHairLine())/factor, style));
+
+    QPainterPath path;
+    path.moveTo(line.p1());
+    path.lineTo(line.p2());
+
+    qreal arrow_step = 60/factor;
+    qreal arrow_size = 10/factor;
+
+    if (line.length() < arrow_step)
+    {
+        DrawArrow(line, path, arrow_size);
+    }
+
+    QLineF axis;
+    axis.setP1(line.p1());
+    axis.setAngle(line.angle());
+    axis.setLength(arrow_step);
+
+    int steps = qFloor(line.length()/arrow_step);
+    for(int i=0; i<steps; ++i)
+    {
+        DrawArrow(axis, path, arrow_size);
+        axis.setLength(axis.length()+arrow_step);
+    }
+    item->setPath(path);
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VisToolTriangle::DrawArrow(const QLineF &axis, QPainterPath &path, const qreal &arrow_size)
+{
+    QLineF arrowPart1;
+    arrowPart1.setP1(axis.p2());
+    arrowPart1.setLength(arrow_size);
+    arrowPart1.setAngle(axis.angle()+180+35);
+
+    path.moveTo(arrowPart1.p1());
+    path.lineTo(arrowPart1.p2());
+
+    QLineF arrowPart2;
+    arrowPart2.setP1(axis.p2());
+    arrowPart2.setLength(arrow_size);
+    arrowPart2.setAngle(axis.angle()+180-35);
+
+    path.moveTo(arrowPart2.p1());
+    path.lineTo(arrowPart2.p2());
+}
diff --git a/src/app/visualization/vistooltriangle.h b/src/app/visualization/vistooltriangle.h
new file mode 100644
index 000000000..b34b5cd0e
--- /dev/null
+++ b/src/app/visualization/vistooltriangle.h
@@ -0,0 +1,65 @@
+/************************************************************************
+ **
+ **  @file   vistooltriangle.h
+ **  @author Roman Telezhynskyi <dismine(at)gmail.com>
+ **  @date   13 8, 2014
+ **
+ **  @brief
+ **  @copyright
+ **  This source code is part of the Valentine project, a pattern making
+ **  program, whose allow create and modeling patterns of clothing.
+ **  Copyright (C) 2014 Valentina project
+ **  <https://bitbucket.org/dismine/valentina> All Rights Reserved.
+ **
+ **  Valentina is free software: you can redistribute it and/or modify
+ **  it under the terms of the GNU General Public License as published by
+ **  the Free Software Foundation, either version 3 of the License, or
+ **  (at your option) any later version.
+ **
+ **  Valentina is distributed in the hope that it will be useful,
+ **  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ **  GNU General Public License for more details.
+ **
+ **  You should have received a copy of the GNU General Public License
+ **  along with Valentina.  If not, see <http://www.gnu.org/licenses/>.
+ **
+ *************************************************************************/
+
+#ifndef VISTOOLTRIANGLE_H
+#define VISTOOLTRIANGLE_H
+
+#include "visline.h"
+
+class VisToolTriangle : public VisLine
+{
+    Q_OBJECT
+public:
+    VisToolTriangle(const VContainer *data, QGraphicsItem *parent = 0);
+    virtual ~VisToolTriangle();
+
+    virtual void RefreshGeometry();
+
+    void         setPoint2Id(const quint32 &value);
+    void         setHypotenuseP1Id(const quint32 &value);
+    void         setHypotenuseP2Id(const quint32 &value);
+private:
+    Q_DISABLE_COPY(VisToolTriangle)
+    quint32              point2Id;//axis second point
+    quint32              hypotenuseP1Id;
+    quint32              hypotenuseP2Id;
+    QGraphicsEllipseItem *point;
+    QGraphicsEllipseItem *axisP1;
+    QGraphicsEllipseItem *axisP2;
+    QGraphicsPathItem    *axis;
+    QGraphicsEllipseItem *hypotenuseP1;
+    QGraphicsEllipseItem *hypotenuseP2;
+    QGraphicsLineItem    *foot1;
+    QGraphicsLineItem    *foot2;
+
+    void         DrawAimedAxis(QGraphicsPathItem *item, const QLineF &line, const QColor &color,
+                               Qt::PenStyle style = Qt::SolidLine);
+    void         DrawArrow(const QLineF &axis, QPainterPath &path, const qreal &arrow_size);
+};
+
+#endif // VISTOOLTRIANGLE_H
diff --git a/src/app/visualization/visualization.pri b/src/app/visualization/visualization.pri
index 63a4dd5ba..f646db34e 100644
--- a/src/app/visualization/visualization.pri
+++ b/src/app/visualization/visualization.pri
@@ -11,7 +11,8 @@ HEADERS += \
     visualization/vistoolshoulderpoint.h \
     visualization/vistoolnormal.h \
     visualization/vistoolheight.h \
-    visualization/vistoolpointofintersection.h
+    visualization/vistoolpointofintersection.h \
+    visualization/vistooltriangle.h
 
 SOURCES += \
     visualization/vgraphicssimpletextitem.cpp \
@@ -26,4 +27,5 @@ SOURCES += \
     visualization/vistoolshoulderpoint.cpp \
     visualization/vistoolnormal.cpp \
     visualization/vistoolheight.cpp \
-    visualization/vistoolpointofintersection.cpp
+    visualization/vistoolpointofintersection.cpp \
+    visualization/vistooltriangle.cpp