Pythagoras' Theorem

Before doing this section you should revise the National 4 Lifeskills Maths section on Pythagoras.

In a right-angled triangle there is a relationship among the three sides. This relationship is shown below.

Diagram of a right-angled triangle with abc labels.

In National 5 Lifeskills Maths it is likely that you will have to use Pythagoras' Theorem as one step in a bigger question.