A polygon is a shape that has at least three sides but typically has five or more sides. Some examples of polygons are octogons, hexagons, squares, rectangles, and triangles. Polygom is a broad term that includes all these shaoes and more.
When a polygon with any number of sides has equal lengths on all its sides it is called a regular polygon this is a special class of polygons. An example of a regular polygon is a stop sign. A stop sign is an octagon with all eight sides equaling the same lengtth.