Pupils learn how to estimate square roots of numbers using only a pencil, ruler and a pair of compasses. Originally discovered by Rene Descartes, it is based around Pythagoras' Theorem (a proof is included in the powerpoint). If you like this resource then please check out my other stuff on here! :)
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I really like this. Great for practising accurate drawing and also really nice to have a proof along with some history to stretch the more able. It's also superb that I've learnt something too! Thanks.
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