5th Grade · Geometry
Quadrilateral
5.G.B.3
Definition
A polygon with four sides and four angles.
Examples
- Squares, rectangles, and trapezoids are all quadrilaterals.
- A parallelogram is a quadrilateral with two pairs of parallel sides.
Key rule
Every quadrilateral has exactly four sides and four angles.
Memory hook
Quad means four — four sides, four angles.