Polygon (noun)

1. A closed plane figure with three or more straight sides and angles.
2. A geometric figure with at least three straight sides and angles.

Origin:

The term "polygon" is derived from the greek word "poly" meaning "many" and "gon" meaning "angle".

Examples:

1. A triangle is a polygon with three sides.
2. The polygon had six sides and six angles.
3. The shape of the polygon is a square.
4. The polygon was a regular hexagon.
5. He drew a polygon on the paper with a compass.