## Thinking Mathematically (6th Edition)

$c=17$
Pythagorean Theorem: $a^{2}+b^{2}=c^{2}$ Step 1: plug in the given lengths into the formula. $8^{2}+15^{2}=c^{2}$ Step 2: Solve. 64+225=$c^{2}$ 289=$c^{2}$ Step 3: take the square root of both sides. $\sqrt{289}=\sqrt c^{2}$ 17=c Answer: c=17 m