Students learn how to use Pythagoras' Theorem to calculate the hypotenuse of a right-angled-triangle.

Later, as learning progresses they use Pythagoras' Theorem to determine whether a triangle is right-angled.

**Differentiated Learning Objectives**

- All students should be able to calculate the squared area of each edge of a right-angled triangle.
- Most students should be able to calculate the hypotenuse length of a right-angled triangle.
- Some students should be able to use Pythagoras’ Theorem to determine whether a triangle has a right-angle.