Area of a trapezoid


This lesson will show how we find the area of a trapezoid by using the formula you see below the trapezoid



Area of a trapezoid formula
Example #1:

If b1 = 7 cm, b2 = 21 cm, and h = 2 cm, find A

(b1 + b2)/2 = (7 + 21)/2 = 28/2 = 14

A= 14 × 2 = 28 cm

Example #2:

If b1 = 15 cm, b2 = 25 cm, and h = 10 cm, find A

(b1 + b2)/2 = (15 + 25)/2 = 40/2 = 20

A= 20 × 10 = 200 cm

Example #3:

If b1 = 9 cm, b2 = 15 cm, and h = 2 cm, find A

(b1 + b2)/2 = (9 + 15)/2 = 24/2 = 12

A= 12 × 2 = 24 cm

Area of a trapezoid quiz to find out if you really understand this lesson.


Buy a comprehensive geometric formulas ebook. All geometric formulas are explained with well selected word problems.






Recent Articles

  1. Divide Using Repeated Subtraction

    Mar 06, 17 11:44 AM

    Learn to divide using repeated subtraction with this easy to follow math lesson

    Read More

New math lessons

Your email is safe with us. We will only use it to inform you about new math lessons.

            Follow me on Pinterest


Page copy protected against web site content infringement by Copyscape






Recent Lessons

  1. Divide Using Repeated Subtraction

    Mar 06, 17 11:44 AM

    Learn to divide using repeated subtraction with this easy to follow math lesson

    Read More