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.

(a) A closed curve that is not a polygon – a polygon is a two-dimentional figure which has minimum 3 or more straight lines. So, circle isn’t a polygon.

(b) An open curve made up entirely of line segments.

(c) A polygon with two sides isn’t possible. Because a polygon is a closed shape with sides minimum number of three sides.