"Pythagoras Theorem" How to find third side of right angled triangle when two other sides are given?

Pythagoras theorem states that "In a right angled triangles" square of hypotenuse is equal to sum of squares of other two sides.

We have a triangle ABC right angled at B. According to Pythagoras theorem, we have

Lets suppose that we have BC=8 cm and AC=10 cm. What is the length of AB?

By Pythagoras theorem, we have .

cm