# G16d – Area of a trapezium

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Prerequisites

# Area of a trapezium

#### Showing that $$\text{Area} = \dfrac{h(a+b)}{2}$$

Move the red points around to form any trapezium you like. Then pick any of the methods and drag the slider to see how you could work out the area of the trapezium using your knowledge of parallelograms, triangles or rectangles.
With thanks to Mark Dabbs, whose Area of Trapezium Demonstration worksheet is available here. Material modified and embedded here under the CC-BY-SA 3.0 license.
Teacher resources