G17c – Area of a circle

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Starting point: estimating area by counting squares

There is a printable worksheet version of this activity in the linked teacher resources below.

Area of a circle

Teacher resources

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  • Slides in PDF (one slide per page, suitable for importing into IWB software)
  • Further resources on external sites (log in to see links)
Links to past exam questions

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Visualise an approximate link between the area of a circle and its radius

Drag down the slider to see that the area of a circle with radius r is between 2r2 and 4r2.

In the real world

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