### Home > MC2 > Chapter 10 > Lesson 10.2.3 > Problem 10-109

10-109.

Use the Pythagorean theorem.

7^{2} + *x*^{2} = 30^{2}

49 + *x*^{2} = 900

*x*^{2} = 851

10-109.

Use the Pythagorean theorem.

7^{2} + *x*^{2} = 30^{2}

49 + *x*^{2} = 900

*x*^{2} = 851