G17b – Circumference of a circle

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Starting point: approximately how many diameters fit into the circumference?

Just by looking, can you estimate roughly how many diameter-lengths of string you could arrange around the circumference without overlapping? Hit animate to see the answer.

Circumference of a circle

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)
Links to past exam questions

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In the real world

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