The rightangle triangle lenghts are .

The longest side is , hence , it is measure of the hypotenuse.

Let and be the lengths of the two shorter sides.

Here, and .

The Pythagorean theorem states that .

Then .

Check the values.

                          (Pythagorean theorem)

                   (Substitute , and )

               (Evaluate powers: and )

                              (Add: )

Thus, the lengths form a right triangle.

The lengths form a right triangle.