### Home > MC2 > Chapter 10 > Lesson 10.1.5 > Problem 10-63

10-63.

Since this is a right trianlgle, we can use the Pythagorean Theorem to find the missing side length.

(leg 1)^{2} + (leg 2)^{2} = (hypotenuse)^{2}

We know one of the leg lengths and the hypotenuse. Substitute the numbers into the equation.

*x*^{2} + (8)^{2} = 17^{2}

Now solve for *x*.