PLEASE HELP ME WITH THIS IT'S TIMED I WILL GIVE BRAINLIEST-

1. A right triangle has side lengths 15 centimeters, 20 centimeters, and 25 centimeters. How can you use the Pythagorean Theorem to write an equation the describes how the side lengths are related?

2. How do you know that the geometric proof of the Pythagorean Theorem in question 1 can be applied to all right triangles?