A polygon is a simple closed curve made up of only
A Polygon is a closed figure made up of line segments (not curves) in a two-dimensional plane. Polygon is the combination of two words, i.e. poly (means many) and gon (means sides).
A minimum of three line segments is required to connect end to end, to make a closed figure. Thus a polygon with a minimum of three sides is known as Triangle. An n-sided polygon is called an n-gon.
Hence, A polygon is a simple closed curve made up of only line segments.