Geometry & Trigonometry
Basic

Area of a Trapezoid

Area of a trapezoid with parallel sides a and b.

Formula

A=12(a+b)hA = \frac{1}{2}(a+b)h

Variables

a, bParallel sides
hHeight

Example

Parallel sides 6 and 10, height 4: A = ½(6+10)·4 = 32.

Did You Know?

The trapezoid rule for area is also the basis of numerical integration in engineering.

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