See section 13.9.2 for regular polygons in space.
The isopolygon command takes three arguments; two points A and B and a non-zero integer k.
isopolygon returns and draws the regular |k|-sided
polygon with one side AB. If k > 0, then the
polygon will continue counterclockwise; if k < 0, then it
will be clockwise.
Input:
Output:
Input:
Output: