CPM Homework Help : PC3 Problem 6-32

In $ΔABC$ , $m∠C = 60^\circ$ , $a = 10$ , and $b = 14$ . Use the Law of Cosines to calculate $c$ .

Step:

$c^2=10^2+14^2-2\left(10\right)\left(14\right)\cos\left(60^\circ\right)$