An understanding of how to use Pythagoras’ theorem to find missing sides in a right-angled triangle is essential for applying the theorem in different contexts. Pythagoras’ theorem can be used ...

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.

Two New Orleans high school students have proven the Pythagorean Theorem using trigonometry without relying on circular reasoning. That should be impossible.