Enter the 3 sides of a triangle into the calculator. The calculator will evaluate and display the area using heron’s formula.

## Heron’s Formula

The following formula is used to calculate the area of a triangle.

area = 0.25 * √((a + b + c) * (-a + b + c) * (a – b + c) * (a + b – c))

- Where a, b, and c are the lengths of the sides of the triangle.

## Heron’s Formula Defintion

Heron’s formula states that the area of a triangle can be calculated using the 3 lengths of the side of that triangle.

## Heron’s Formula Example

How to calculate heron’s formula?

**First, measure side A.**Measure the length of side A.

**Next, measure side B.**Measure the length of side B.

**Next, measure side C.**Measure the length of side C.

**Finally, calculate the area.**Using heron’s formula, calculate the area of the triangle.

## FAQ

**What is Heron’s Formula?**

Heron’s formula is a formula derived from trigonometric equations that can be used to calculate the area of a triangle given the 3 lengths of the side of that triangle.

**How to calculate heron’s formula?**

Simply measure the 3 lengths of the triangle, and plug the values into the formula above to calculate the area.