Question

What is a regular polygon?

Answer 1

A regular polygon is a polygon all of whose sides are of the same length (equilateral) and all of whose internal angles are the same (equiangular).

Explanation:

An `n`-sided regular polygon is rotationally symmetric around its centre.

Both equilateral and equiangular conditions are required. For example a rhombus is equilateral and a rectangle is equiangular, but the only regular quadrilateral is a square.