Find the missing side lengths. Answers are in simplest radical form with the denominator rationalized.

Answer:
7 sq rt 2
Step-by-step explanation:
must use pythagorean theorem: square of each leg = square of hypotenuse
7 squared the 7 squared = u squared
49+49=u squared
u = square root of 98, which is sq root of 49 times sq root of 2