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Area of a trapezoid from surrounding rectangle

This math skill teaches how to find the area of a trapezoid by rearranging it into an equivalent rectangle. The dimensions of the rectangle are derived by averaging the lengths of the parallel sides of the trapezoid.

Learn area of a trapezoid from surrounding rectangle

Teaching Transcript

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What is the area of this trapezoid?

We can rearrange to create a rectangle that is the average length of the trapezoid

This gives a rectangle with dimensions of 8 and 5, so the area is 40

Skill Practice

Area of a trapezoid from surrounding rectangle

Test your understanding of area of a trapezoid from surrounding rectangle by practicing it! Work through the below exercises to use it in practice.