# How do you use Heron's formula to find the area of a triangle with sides of lengths #4 #, #8 #, and #5 #?

##### 1 Answer

Feb 12, 2016

#### Explanation:

**Heron's formula** is

First determine

Use Heron's formula to find the area of the triangle.

Substitute the known values into the equation.

Simplify.

Simplify.

Take the square root.