Geometry · Quadrilaterals & Polygons
Square
HSG-CO.C.11
Definition
A regular quadrilateral with four congruent sides and four right angles.
Examples
- A square has four equal sides and four right angles — it is both a rectangle and a rhombus.
- Every square is a parallelogram, rectangle, and rhombus at once.
Key rule
A square combines the properties of both a rectangle and a rhombus.
Memory hook
Equal sides plus right angles — both a rectangle and a rhombus.