### Home > A2C > Chapter 7 > Lesson 7.3.1 > Problem7-161

7-161.
1. Find mC in each triangle below. Homework Help ✎

Use the Law of Cosines: 82 = 102 + 122 − 2(10)(12) cos C

C ≈ 41.41°

$\text{Remember that tan }C=\frac{\text{opp.}}{\text{adj.}}$