Outer Radius - set the outer radius of the circle the arc is drawn around.
Inner Radius - set the inner radius of the circle the arc is drawn around.
Start Angle - set the angle the curve starts at.
End Angle - set the angle the curve ends at.
Bezier - when checked the Arc is created with bezier points.
Divisions - set the number of divisions between points. This is particularly useful for creating smoother deformations.