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Prerequisites
- A knowledge of the four operations from lessons N2a, N2b, N2c, N2d, N2e and N2f is assumed
- G16a – Area of a rectangle
- G16b – Area of a parallelogram
- G16c – Area of a triangle
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
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- Slides in PPTX (with click-to-reveal answers)
- Slides in PDF (one slide per page, suitable for importing into IWB software)
- Worksheet (with space for student work)
- Handout (slides with exercises only; 4 per page for reduced printing)
Further material on this topic embedded here (log in to see)
Links to past exam questions
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In the real world
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