Definition and Usage

The Pythagoras’ Theorem states that the square of the hypotenuse is equal to the sum of the squares of the other two sides in a right-angled triangle.
The hypotenuse is the side opposide the right angle and is also the longest side of a triangle. 

Given the length of two sides of a right-angled triangle, we can use the Pythagoras’ theorem to find the third side.

Video Example 1

Here is a short video example to help visualise how it can be applied and used:

Video Example 2

Here is another video worked example:

Worked Example

Here is a worked example: