Inner and outer radii (either order) of the circle. A value of either zero or blank for either RAD1 or RAD2, or the same value for both RAD1 and RAD2, defines a solid circle.

Starting and ending angles (either order) of the circular area. Used for creating a circular sector. The sector begins at the algebraically smaller angle, extends in a positive angular direction, and ends at the larger angle. The starting angle defaults to 0.0° and the ending angle defaults to 360.0°. See the Modeling and Meshing Guide for an illustration.