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The Ancient Discovery
The Ancient Discovery
Over 2,500 years ago, Pythagoras discovered a beautiful relationship in right-angled triangles: if you square the two shorter sides and add them together, you get the square of the longest side (the hypotenuse). This works for EVERY right-angled triangle in the universe!
Visual: Pythagoras' Theorem
The Formula
Where c is the hypotenuse (the longest side, opposite the right angle)
Now try it yourself
Quiz · Question 1 of 17
In a right-angled triangle with legs a and b and hypotenuse c, which formula is Pythagoras' theorem?
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This topic in real past papers
Every real exam question we've found on pythagoras' theorem, with a full worked answer.