diff --git a/src/libs/vgeometry/vellipticalarc.cpp b/src/libs/vgeometry/vellipticalarc.cpp
index a89276dbb..a2d206c8b 100644
--- a/src/libs/vgeometry/vellipticalarc.cpp
+++ b/src/libs/vgeometry/vellipticalarc.cpp
@@ -361,7 +361,44 @@ void VEllipticalArc::EllipticalArcName()
 //---------------------------------------------------------------------------------------------------------------------
 void VEllipticalArc::FindF2(qreal length)
 {
-    // We need to calculate the second angle,
+    qreal gap = 180;
+    if (length < 0)
+    {
+        //length = qAbs(length);
+        d->isFlipped = true;
+        gap = -gap;
+    }
+    while (length > MaxLength())
+    {
+        //length = length - MaxLength();
+    }
+
+    // We need to calculate the second angle
+    // first approximation of angle between start and end angles
+
+    qreal endAngle = GetStartAngle() + gap;
+    d->f2 = endAngle; // we need to set the end anngle, because we want to use GetLength()
+
+    qreal lenBez = GetLength(); // first approximation of length
+
+    qreal eps = 0.001 * qAbs(length);
+
+    while (qAbs(lenBez - length) > eps)
+    {
+        gap = gap/2;
+        if (lenBez > length)
+        { // we selected too big end angle
+            endAngle = endAngle - qAbs(gap);
+        }
+        else
+        { // we selected too little end angle
+            endAngle = endAngle + qAbs(gap);
+        }
+        d->f2 = endAngle;
+        lenBez = GetLength();
+    }
+    d->formulaF2 = QString("%1").arg(d->f2);
+    d->formulaLength = QString("%1").arg(lenBez);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/test/ValentinaTest/tst_vellipticalarc.cpp b/src/test/ValentinaTest/tst_vellipticalarc.cpp
index 6ec4e2e37..22c429aaf 100644
--- a/src/test/ValentinaTest/tst_vellipticalarc.cpp
+++ b/src/test/ValentinaTest/tst_vellipticalarc.cpp
@@ -57,13 +57,13 @@ void TST_VEllipticalArc::CompareTwoWays()
     const QString errorMsg =
             QString("Difference between real and computing lengthes bigger than eps = %1.").arg(eps);
     QVERIFY2(qAbs(arc1.GetLength() - length) <= eps, qUtf8Printable(errorMsg));
-    //QVERIFY2(arc2.GetLength() - length <= eps, qUtf8Printable(errorMsg));
-    //QVERIFY2(arc1.GetLength() - arc2.GetEndAngle() <= eps, qUtf8Printable(errorMsg));
+    QVERIFY2(qAbs(arc2.GetLength() - length) <= eps, qUtf8Printable(errorMsg));
+    QVERIFY2(qAbs(arc1.GetLength() - arc2.GetLength()) <= eps, qUtf8Printable(errorMsg));
 
     // compare angles
-    //QVERIFY2(arc1.GetEndAngle() - arc2.GetEndAngle() <= eps, qUtf8Printable(errorMsg));
-    //QVERIFY2(arc1.GetEndAngle() - f2 <= eps, qUtf8Printable(errorMsg));
-    //QVERIFY2(arc1.GetEndAngle() - f2 <= eps, qUtf8Printable(errorMsg));
+    QVERIFY2(qAbs(arc1.GetEndAngle() - arc2.GetEndAngle()) <= eps, qUtf8Printable(errorMsg));
+    QVERIFY2(qAbs(arc1.GetEndAngle() - f2) <= eps, qUtf8Printable(errorMsg));
+    QVERIFY2(qAbs(arc1.GetEndAngle() - f2) <= eps, qUtf8Printable(errorMsg));
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -78,14 +78,15 @@ void TST_VEllipticalArc::NegativeArc()
 
     const qreal h = ((radius1-radius2)*(radius1-radius2))/((radius1+radius2)*(radius1+radius2));
     const qreal length = M_PI*(radius1+radius2)*(1+3*h/(10+qSqrt(4-3*h)))/2;
-    VEllipticalArc arc(-length, center, radius1, radius2, f1);
+    qreal l = -length;
+    VEllipticalArc arc(l, center, radius1, radius2, f1);
 
     const qreal eps = 1; // computing error
     const QString errorMsg =
             QString("Difference between real and computing lengthes bigger than eps = %1.").arg(eps);
 
-    //QVERIFY2(qAbs(arc.GetLength() - length) <= eps, qUtf8Printable(errorMsg));
-    //QVERIFY2(arc.GetEndAngle() - f2 <= eps, qUtf8Printable(errorMsg));
+    QVERIFY2(qAbs(arc.GetLength() + length) <= eps, qUtf8Printable(errorMsg));
+    QVERIFY2(arc.GetEndAngle() - f2 <= eps, qUtf8Printable(errorMsg));
 }
 
 // cppcheck-suppress unusedFunction