Rectangles

ByKatie GuebertNicole StaplesKarsen BurgrabeMarris Parks

VIDEO

Properties of Rectangles

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

Formulas Relevant to Rectangles

To find the perimeter of a rectangle add up all the lengths of the sides.P=2L+2W

To find the area of a rectangle, multiply the length times the widthArea= L x W

To find the length of a diagonal of a rectangle, use the Pythagorean Theoremd^2=L^2 +W^2

Diagonals of Rectangles

A square of a diagonal length is equal to a sum of squares of its sides lengths.

Diagonals of a rectangle are equal and bisect each other.

Videography made possible by

Laura Guebert

• http://www.mathopenref.com/rectangle.html

• http://www.coolmath.com/reference/rectangles.html

Citations