Answer these two question  ASAP

The legs of a right triangle are 5 units and 15 units. What is the length of the hypotenuse?

A 200 units
B square root 200 units
C square root 250 units
D 250 units

explain this question below only

The sets of numbers 3, 4, 5 and 8, 15, 17 are Pythagorean triples. Use what you know about the Pythagorean Theorem and explain or show why they are Pythagorean triples. Be sure to show your work for each set of triples!