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Five Circuits, Seven Spins

A circular plate rolls inside a rectangular tray making five circuits and rotating about its centre seven times. Find the dimensions of the tray.

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Pole Vaulting

Consider the mechanics of pole vaulting

Set Square

Age 16 to 18 Challenge Level:

You might look for a cyclic quadrilateral.


We have constructed this in geogebra to help




Created with GeoGebra


You might like to download your own free copy of GeoGebra from the link above and draw this dynamic diagram for yourself. You will find it easy to get started on GeoGebra with the Quickstart guide for beginners.