Geometry · Quadrilaterals & Polygons
Regular Polygon
HSG-CO.C.11
Definition
A polygon with all sides congruent and all angles congruent.
Examples
- A regular polygon is equilateral (all sides equal) and equiangular (all angles equal).
- A square is a regular polygon; a rectangle that isn't a square is not.
Key rule
A regular polygon must be both equilateral and equiangular.
Memory hook
All sides equal, all angles equal.