Translations:Sketcher Examples/16/en

From FreeCAD Documentation

A pie segment of construction geometry displays the relation between the arc and the radius for a given angle.
InputLength = ReferenceRadius * Pi
and
ArcLength = DynamicRadius * Pi * ArcAngle / 180°
with constant length results in:
ReferenceRadius * Pi = DynamicRadius * Pi * ArcAngle / 180°
And with Pi eliminated we get:
ReferenceRadius = DynamicRadius * ArcAngle / 180° or DynamicRadius = ReferenceRadius * 180° / ArcAngle

The expression for the DynamicRadius value: .Constraints.ReferenceRadius * 180 ° / .Constraints.ArcAngle