Finding the Hypotenuse

Knowing the two legs, the theorem gives the hypotenuse. Square the legs, add them, and take the square root.

Here the legs are 8 and 6: ${8}^{2}+{6}^{2} = 64+36$, which is 100. So ${c}^{2} = 100$ and c = 10, because 10 × 10 = 100. Only the positive root counts: a length is never negative.

On the stage, tap the hypotenuse and pick Pythagorean theorem. The board checks that the triangle has a right angle before it uses the rule.