The right angle is the largest angle in a right triangle, so the hypotenuse is the longest side of the triangle. The hypotenuse of a right triangle can be found using the Pythagorean Theorem.
For a right triangle with a hypotenuse of length c and leg lengths a and b:
c2 = a2 + b2
Find the hypotenuse length of the triangle below.
Given legs a =15 and b = 20:
c2 = 152 + 202
c2 = 625
c = 25
So, the hypotenuse length is 25.