Area of a Trapezoid

Area of a Trapezoid

How to find the area of a trapezoid: formula, example, and its solution.

Formula

A = (1/2)(b1 + b2)h. A: area of a trapezoid. b1, b2: base. h: height.

A = (1/2)(b1 + b2)h

A: Area of a trapezoid
b1, b2: Bases
h: Height

Example

Find the area of the given trapezoid. Bases: 5, 8. Height: 4.

b1 = 5
b2 = 8
h = 4

So A = (1/2)(5 + 8)⋅4.

5 + 8 = 13
(1/2)⋅4 = 2

13⋅2 = 26

So A = 26.