# Chapter 6 - Section 6.2 - The Law of Cosines - Concept and Vocabulary Check - Page 729: 4

Heron’s formula for the area of a triangle with sides $a$, $b$, and $c$ is: area $=\sqrt{s\left( s-a \right)\left( s-b \right)\left( s-c \right)}$, where $s=\frac{a+b+c}{2}$.

#### Work Step by Step

Given above.

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