Regular polygons in the plane: isopolygon

### 13.10.2 Regular polygons in the plane: isopolygon

See Section 14.9.2 for regular polygons in space.

The isopolygon command creates regular polygons.

- isopolygon takes three arguments:
  - A,B, two points.
  - k, a nonzero integer.
- isopolygon(A,B,k 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.

#### Examples

- Input:
  isopolygon(0,1,4)
  Output:
  Input:
  isopolygon(0,1,-4)
  Output: