An isosceles right triangle has legs that are each 4cm. What is the length of the hypotenuse?
We will use the Pythagorean Theorem for this problem.
We know that each leg is
By the Pythagorean theorem, the square of the hypotenuse of a right triangle is equal to the sum of the squares of it's legs. That is, for a right triangle with legs
In this case, we have