# What is Heron's formula?

##### 2 Answers

Heron's formula allows you to evaluate the area of a triangle knowing the length of its three sides.

The area

Where

For example; consider the triangle:

The area of this triangle is

So:

Using Heron's formula:

And:

The demonstration of Heron's formula can be found in textbooks of geometry or maths or in many websites. If you need it have a look at:

http://en.m.wikipedia.org/wiki/Heron%27s_formula

Heron's Formula is usually the worst choice for finding the area of a triangle.

#### Explanation:

Alternatives:

Area

Area

Area of a triangle with vertices

Oh yeah, Heron's Formula is