# A triangle has sides with lengths: 2, 8, and 4. How do you find the area of the triangle using Heron's formula?

According to Heron's formula if $a$, $b$, $c$ are three sides of a triangle, its area is given by $\sqrt{s \left(s - a\right) \left(s - b\right) \left(s - c\right)}$, where $s = \frac{1}{2} \left(a + b + c\right)$.