GCSE Maths

Pythagoras's Theorem

One ancienct Greek mathematician and philosopher, Pythagoras (c. 580 - 500 BC) determined a truly remarkable relationship between the lengths of the sides of right-angle triangles:

right angle triangle showing hypotenuse, and the opposite and adjacent sides to an angle

hypotenuse² = opposite² + adjacent²

This is known as Pythagoras's Theorem and it works for all right-angled triangles. Let's see it in action.

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