5.  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.

Answers (1)

(a) A closed curve that is not a polygon is possible.

e.g an ellipse or a circle

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

(c) A polygon with two sides is not possible since by definition polygons are closed figures which require at least three line segments to be made.

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