diff --git a/container/vcontainer.cpp b/container/vcontainer.cpp
index 65292950e..947b84551 100644
--- a/container/vcontainer.cpp
+++ b/container/vcontainer.cpp
@@ -64,7 +64,7 @@ void VContainer::setData(const VContainer &data){
     standartTable = *data.DataStandartTable();
     incrementTable = *data.DataIncrementTable();
     lengthLines = *data.DataLengthLines();
-    lineAngles = *data.DataLengthArcs();
+    lineAngles = *data.DataLineAngles();
     splines = *data.DataSplines();
     modelingSplines = *data.DataModelingSplines();
     lengthSplines = *data.DataLengthSplines();
diff --git a/dialogs/dialogarc.cpp b/dialogs/dialogarc.cpp
index 7b4548ef1..7e02eb74c 100644
--- a/dialogs/dialogarc.cpp
+++ b/dialogs/dialogarc.cpp
@@ -63,7 +63,7 @@ DialogArc::DialogArc(const VContainer *data, Draw::Draws mode, QWidget *parent)
     connect(ui->radioButtonStandartTable, &QRadioButton::clicked, this, &DialogArc::StandartTable);
     connect(ui->radioButtonIncrements, &QRadioButton::clicked, this, &DialogArc::Increments);
     connect(ui->radioButtonLengthLine, &QRadioButton::clicked, this, &DialogArc::LengthLines);
-    connect(ui->radioButtonLineAngles, &QRadioButton::clicked, this, &DialogArc::LineArcs);
+    connect(ui->radioButtonLineAngles, &QRadioButton::clicked, this, &DialogArc::LineAngles);
 
     connect(ui->toolButtonEqualRadius, &QPushButton::clicked, this, &DialogArc::EvalRadius);
     connect(ui->toolButtonEqualF1, &QPushButton::clicked, this, &DialogArc::EvalF1);
@@ -173,19 +173,22 @@ void DialogArc::PutF2(){
     PutValHere(ui->lineEditF2, ui->listWidget);
 }
 
-void DialogArc::LineArcs(){
-    ShowLineArcs();
+void DialogArc::LineAngles(){
+    ShowLineAngles();
 }
 
 void DialogArc::RadiusChanged(){
+    labelEditFormula = ui->labelEditRadius;
     ValFormulaChanged(flagRadius, ui->lineEditRadius, timerRadius);
 }
 
 void DialogArc::F1Changed(){
+    labelEditFormula = ui->labelEditF1;
     ValFormulaChanged(flagF1, ui->lineEditF1, timerF1);
 }
 
 void DialogArc::F2Changed(){
+    labelEditFormula = ui->labelEditF2;
     ValFormulaChanged(flagF2, ui->lineEditF2, timerF2);
 }
 
@@ -209,12 +212,13 @@ void DialogArc::EvalF2(){
     Eval(ui->lineEditF2, flagF2, timerF2, ui->labelResultF2);
 }
 
-void DialogArc::ShowLineArcs(){
+void DialogArc::ShowLineAngles(){
     disconnect(ui->listWidget, &QListWidget::currentRowChanged, this, &DialogArc::ValChenged);
     ui->listWidget->clear();
     connect(ui->listWidget, &QListWidget::currentRowChanged, this, &DialogArc::ValChenged);
-    const QHash<QString, qreal> *lineArcsTable = data->DataLineAngles();
-    QHashIterator<QString, qreal> i(*lineArcsTable);
+    const QHash<QString, qreal> *lineAnglesTable = data->DataLineAngles();
+    Q_CHECK_PTR(lineAnglesTable);
+    QHashIterator<QString, qreal> i(*lineAnglesTable);
     while (i.hasNext()) {
         i.next();
         QListWidgetItem *item = new QListWidgetItem(i.key());
diff --git a/dialogs/dialogarc.h b/dialogs/dialogarc.h
index 00f23e8e5..cb4291a5c 100644
--- a/dialogs/dialogarc.h
+++ b/dialogs/dialogarc.h
@@ -53,7 +53,7 @@ public slots:
     void             PutRadius();
     void             PutF1();
     void             PutF2();
-    void             LineArcs();
+    void             LineAngles();
     void             RadiusChanged();
     void             F1Changed();
     void             F2Changed();
@@ -75,7 +75,7 @@ private:
     void             EvalRadius();
     void             EvalF1();
     void             EvalF2();
-    void             ShowLineArcs();
+    void             ShowLineAngles();
 };
 
 #endif // DIALOGARC_H
diff --git a/dialogs/dialogarc.ui b/dialogs/dialogarc.ui
index 26d4e43bb..3f08b5a41 100644
--- a/dialogs/dialogarc.ui
+++ b/dialogs/dialogarc.ui
@@ -482,7 +482,7 @@
          <item>
           <widget class="QRadioButton" name="radioButtonLengthArc">
            <property name="enabled">
-            <bool>true</bool>
+            <bool>false</bool>
            </property>
            <property name="text">
             <string>Length of arcs</string>
@@ -492,10 +492,10 @@
          <item>
           <widget class="QRadioButton" name="radioButtonLengthSpline">
            <property name="enabled">
-            <bool>true</bool>
+            <bool>false</bool>
            </property>
            <property name="text">
-            <string>Length of arcs</string>
+            <string>Length of curves</string>
            </property>
           </widget>
          </item>
diff --git a/tools/drawTools/vdrawtool.h b/tools/drawTools/vdrawtool.h
index 513ca12cd..e96f93816 100644
--- a/tools/drawTools/vdrawtool.h
+++ b/tools/drawTools/vdrawtool.h
@@ -47,6 +47,8 @@ protected:
     template <typename Dialog, typename Tool>
     void ContextMenu(QSharedPointer<Dialog> &dialog, Tool *tool, QGraphicsSceneContextMenuEvent *event,
                      bool showRemove = true){
+        Q_CHECK_PTR(tool);
+        Q_CHECK_PTR(event);
         if(!ignoreContextMenuEvent){
             QMenu menu;
             QAction *actionOption = menu.addAction(tr("Options"));
diff --git a/tools/drawTools/vtoolarc.cpp b/tools/drawTools/vtoolarc.cpp
index 84d453f8e..46cc44a5b 100644
--- a/tools/drawTools/vtoolarc.cpp
+++ b/tools/drawTools/vtoolarc.cpp
@@ -44,9 +44,9 @@ void VToolArc::setDialog(){
     if(!dialogArc.isNull()){
         VArc arc = VAbstractTool::data.GetArc(id);
         dialogArc->SetCenter(arc.GetCenter());
-        dialogArc->SetRadius(arc.GetFormulaRadius());
         dialogArc->SetF1(arc.GetFormulaF1());
         dialogArc->SetF2(arc.GetFormulaF2());
+        dialogArc->SetRadius(arc.GetFormulaRadius());
     }
 }