Rectangles and squares

Math

Definition

A rectangle is a parallelogram with four right angles. A square is a rectangle with four equal sides. Both have diagonals that are congruent, and in a square, diagonals are also perpendicular.

Examples

  • A rectangle with length 8 and width 5 has area 40 and perimeter 26
  • A square with side 6 has area 36 and diagonal 6√2
  • A computer screen is a rectangle; a checkerboard tile is a square

Related Terms

Parallelogram properties Special quadrilaterals Area of polygons

Study This Concept

Practice rectangles and squares with free review games in these units:

Pre-Algebra Unit 9: Area and Perimeter