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Math Formulas > Geometry > Area of a Trapezoid

Area of a Trapezoid

a: the length of the top
b: the length of the base
h: the height

The area of a trapezoid is given by:

A = (a + b) ∙ h /2

When a = 0, the shape becomes a triangle.

Example: For a = 3 m, b = 5 m and h = 4 m, the area of the trapezoid is determined as shown below:

A = (3 + 5) ∙ 4 /2 = 16 m2

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Area of a Trapezoid

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