Polygonal lines in the plane: open_polygon

### 13.10.4 Polygonal lines in the plane: open_polygon

See Section 14.9.4 for polygonal lines in space.

The open_polygon command draws a polygonal path.

- open_polygon takes an unspecified number of points:
  points, a sequence or list of points.
- open_polygon(points) returns and draws the polygon line with the vertices given by the points.

#### Examples.

- Input:
  open_polygon(-1,-1+i/2,i,1+i,-i)
  Output:
- Input:
  open_polygon(makelist(x->exp(i*pi*x/3),0,5,1))
  Output: