Illustrate, if possible, each one of the following with a rough diagram:
(a) A closed curve that is not a polygon.
(b) An open curve made up entirely of line segments.
(c) A polygon with two sides.
6 × 10-5 m/s, 3 × 10-5 m/s
8 × 10-5 m/s, 4 × 10-5 m/s
2 × 10-5 m/s, 1 × 10-5 m/s
4 × 10-5 m/s, 2 × 10-5 m/s