Pythagoras' theorem describes the relationship between the three sides of a right-angled triangle. It is incredibly useful for engineering and construction and was used by humans centuries before ...

For National 5 Lifeskills Maths revise how Pythagoras' Theorem can determine the side of a right-angled triangle and be used to find a missing dimension.

Learn about and revise how Pythagoras’ theorem can be used to calculate the sides of right-angled triangles with GCSE Bitesize OCR Maths.

Two high school seniors have presented their proof of the Pythagorean theorem using trigonometry — which mathematicians thought to be impossible — at an American Mathematical Society meeting.