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# Heron's Formula

Heron’s formula is used for calculating the Area of Triangle, it uses semi perimeter for calculation of area. Semi perimeter is given by:
S = ½ (p + q + r)
The area of the triangle by the heron s formula is given as:
A = √ s (s – p) (s – q) (s – r)
If three mutual Tangent circles are centered on the triangle vertices then they are named as Soddy circles and calculation can be simplified with the help of herons formula. For the trigonometric quantities the heron s formula can be used.
There are two steps that are used to calculate the area of the triangle using herons formula:
First is the need of calculating the semi perimeter of a triangle with the formula as given above and then calculate the area of the triangle by using the formula.
Herons formula is based upon the properties of cyclic quadrilaterals and right Triangles.
The heron's formula is named after the mathematician Heron of Alexandria. The herons formula is derived from the other formulas of area of a triangle.
Suppose that the each side of a triangle is 6 inch long then area of the triangle using herons formula can be calculated as:
Step 1: First we need to calculate the semi perimeter that is
s = (6 + 6 + 6) / 2 = 18 / 2 = 9.
Step 2: Then the area is
A = √ 9 * (9 – 6) * (9 – 6) * (9 – 6),
A = √ 9 * (3) * (3) * (3),
√ 243 = 15.588 inch2.
This is all about heron s formula.

## Define Heron's Formula

Heron’s formula is used to find the Area of Triangle when the length of all sides a triangle is given. With the help of hero’s formula we can easily calculate the side of the triangle.
Let’s have a triangle whose sides are ‘x’, ‘y’, ‘z’ are the length of the sides of a triangle, then we will see how to Define Heron's Formula.
Heron’s formula is given by: