Geometry · Quadrilaterals & Polygons
Rhombus
HSG-CO.C.11
Definition
A parallelogram with four congruent sides and perpendicular diagonals.
Examples
- All four sides of a rhombus are equal in length.
- A rhombus's diagonals always cross at a right angle.
Key rule
A rhombus is a parallelogram with all four sides equal.
Memory hook
A parallelogram with all equal sides.