Quadrilateral (four-sided plane figure) with opposite sides equal and parallel and with each interior angle a right angle (90°). Its area A is the product of the length l and height h; that is, A = l × h. A rectangle with all four sides equal is a square.
A rectangle is a special case of a parallelogram. The diagonals of a rectangle are equal and bisect each other.
Rectangles: algebraic expressions
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A quadrilateral (a shape with four sides) with opposite pairs of sides equal in length and parallel, and opposite angles equal. The diagonals of a p