Pythagoras' Theorem

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GCSE Maths> Shape and space> Pythagoras' Theorem
Pythagoras' theorem connects the lengths of two sides of a right-angled triangle with the length of the third side. It only works with right-angled triangles.

Pythagoras' theorem is
r² = x² + y²
Where r is always the side opposite the right angle,
and x and y are the other two sides.

Phythagoras' theorem can be rearranged to find any of the three sides of a triangle. Remember that the length is not r² but it is r (i.e. don't forget to root the answer).

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Page by: Richard Tang

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