How to Calculate the Area of Trapezoids? (+FREE Worksheet!)

Learn more about trapezoids and how to calculate their areas by using the trapezoid area formula.

How to Calculate the Area of Trapezoids? (+FREE Worksheet!)

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Step by step guide to calculate the area of Trapezoids

  • A quadrilateral with at least one pair of parallel sides is a trapezoid.
  • Area of a trapezoid \(= \color{blue}{\frac{1}{2} h(b_{1}+b_{2})}\)

Area of Trapezoids – Example 1:

Calculate the area of the trapezoid.

Solution:

Use trapezoid area formula: \(A= \frac{1}{2} h(b_{1}+b_{2 }) \)
\(b_{1}=14 cm , b_{2}=18\) \(cm\) and \(h=20\) \(cm\)
Then: \(A= \frac{1}{2}(20)(14+18)=10(32)=320\) \(cm^2\)

Area of Trapezoids – Example 2:

Calculate the area of the trapezoid.

Solution:

Use trapezoid area formula: \(A= \frac{1}{2} h(b_{1}+b_{2 }) \)
\(b_{1}=12 cm , b_{2}=16\) \(cm\) and \(h=18\) \(cm\)
Then: \(A= \frac{1}{2}(18)(12+16)=9(28)=252\) \(cm^2\)

Exercises for Calculating Area of Trapezoids

Calculate the area for each trapezoid.

Download Trapezoids Worksheet

  1. \(\color{blue}{28 \ cm^2}\)
  2. \(\color{blue}{100 \ m^2}\)
  3. \(\color{blue}{66 \ ft^2}\)
  4. \(\color{blue}{96 \ cm^2}\)

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