# The Properties of a Rectangle

Definitions and formulas for the perimeter of a rectangle, the area of a rectangle,  how to find the length of the diagonal of a rectangle, properties of the diagonals of a rectangle

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 perimeter of a rectangle area of a rectangle properties of the sidesand angles of a rectangle diagonal of a rectangle properties of the diagonalsof a rectangle

 The perimeter of a rectangle: To find the perimeter of a rectangle, just add up all the lengths of the sides:Perimeter = L + w + L + w        = 2L + 2w The area of a rectangle: To find the area of a rectangle, just multiply the length times the width:Area = L x w The sides and angles of a rectangle: Opposite sides of a rectangle are the same length (congruent). The angles of a rectangle are all congruent (the same size and measure.) Remember that a 90 degree angle is  called a "right angle."  So, a rectangle has four right angles. Opposite angles of a rectangle are congruent.Opposite sides of a rectangle are parallel. 