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`A = sqrt((a+b+c)/2((a+b+c)/2-a)((a+b+c)/2-b)((a+b+c)/2-c)) `

Enter a value for all fields

The **Area of a Triangle from Length of Three Sides** calculator computes the area of a triangle given the length of the triangle's three sides using **Heron's formula**.

**INSTRUCTIONS:** Choose units and enter the following:

- (
**a**) Length of Side**a** - (
**b**) Length of Side**b** - (
**c**) Length of Side**c**

**Area (A): **The calculator returns the area in square meters (m^{2}). However, this can be automatically converted to other area units (e.g. square feet) via the pull-down menu.

The Heron's formula for the area of a triangle based on the length of the three sides is:

`A = sqrt((a+b+c)/2((a+b+c)/2-a)((a+b+c)/2-b)((a+b+c)/2-c)) `

where:

- A is the area of the triangle
- a is the length of one side
- b is the length of one side
- c is the length of one side

The calculator makes a check that no one side is greater than the sum of the other two. In that case, it is impossible to have a triangle.

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