G16d – Area of a trapezium

This is the students’ version of the page. Log in above for the teachers’ version.


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

Teachers: log in to access the following:

  • Slides in PPTX (with click-to-reveal answers)
  • Slides in PDF (one slide per page, suitable for importing into IWB software)

Further material on this topic embedded here (log in to see)

Links to past exam questions

Teachers: log in to access these.

In the real world

Teachers: log in to view this content.