Find the length of the missing side the triangle is not drawn to scale 17 and 15

Okay, so you take the length of your hypotenuse (17) and plug it into the pythagorean theorem as C. And then plug the given side (15) into A or B (doesn't matter which). So: a2 + 152 = 172 a2 + 225=289 Now isolate a^2 by subtracting 225 from both sides of the equation. a2 = 64 Find the square root of both sides to find the missing value. a = 8