Key learning points

1. Right-angled triangles can be seen in real-life (e.g. ladder against a vertical wall).
2. A ratio table can help you find the scalar and functional multipliers in similar shapes.
3. It can be initially difficult to identify whether Pythagoras' theorem can be used.

Keywords

• Pythagoras’ theorem - Pythagoras’ theorem states that the sum of the squares of the two shorter sides of a right-angled triangle is equal to the square of the hypotenuse.

Common misconception