How do you use Pythagoras' theorem to find the area of a right-angled triangle?
Use Pythagoras' theorem to find the length of the base or perpendicular height - whichever isn't given. Then, use the formula for the area of a triangle which is 1/2 x base x perpendicular height.
What is the hypotenuse of a triangle?
The hypotenuse of a triangle is the longest side.
When can I use Pythagoras' Theorem?
You can only use Pythagoras' Theorem when you are given 2 sides of a right-angled triangle and want to find the third side.