Use Pythagoras' theorem to find the length of an unknown side in a right-angled triangle

1. Triangular scales: Calculate length of the side of a right-angled triangle, given ratio
2. Triangular numbers: Calculate lengths using triangle ratios
3. Triangular numbers: Calculate lengths using triangle ratios
4. Triangular numbers: Calculate lengths using triangle ratios
5. Triangularea- area of triangle in circle
6. Comfy Corner - perimeter of a right-angled triangle; Pythagoras