CPolygon:Circle
The Circle method creates a circle polygon, approximated by nPts sides.
| CPolygon:Circle( nRadius ) CPolygon:Circle( nRadius, nPts ) where | 
 nRadius is the radius of the circle.
    nRadius is the radius of the circle.
 nPts is the number of vertices in the polygon.
If not specified, it defaults to 36.
    nPts is the number of vertices in the polygon.
If not specified, it defaults to 36.