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diff --git a/src/arc.cpp b/src/arc.cpp
index f7cde52..e4a6b6f 100644
--- a/src/arc.cpp
+++ b/src/arc.cpp
@@ -456,6 +456,18 @@ same reference number.
 }
 
 
+/*virtual*/ void Arc::Rotate(Point point, double angle)
+{
+	Point c1 = Geometry::RotatePointAroundPoint(position, point, angle);
+	Point ap1(cos(startAngle), sin(startAngle));
+	Point angleStartPoint = (ap1 * radius) + position;
+	Point c2 = Geometry::RotatePointAroundPoint(angleStartPoint, point, angle);
+
+	position = c1;
+	startAngle = Vector(c2, c1).Angle();
+}
+
+
 /*virtual*/ void Arc::Mirror(Point p1, Point p2)
 {
 	Point c1 = Geometry::MirrorPointAroundLine(position, p1, p2);