Área Heron
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
Heron
About this calculator
The Heron area calculator is a useful tool for calculating the area of a triangle when three side lengths are known. This formula is particularly useful in advanced geometry problems and is widely used in mathematics, engineering, and the natural sciences.
The Heron formula is based on the following equation: √(s(s−a)(s−b)(s−c)), where 's' is the semi-perimeter of the triangle, calculated as the sum of the side lengths divided by 2.
This calculator is useful in a variety of situations, from school geometry problems to more complex calculations in fields such as civil engineering and physics. Additionally, it's essential to remember that the Heron formula assumes the triangle is valid, meaning the sum of the lengths of two sides must be greater than the length of the third side.
If you're working on triangle problems and need to calculate the area, this calculator is a valuable tool to have on hand.
Frequently asked questions
How do I calculate the semi-perimeter of a triangle?
The semi-perimeter is calculated by dividing the sum of the triangle's sides by 2. For example, if the sides are a, b, and c, the semi-perimeter is (a + b + c) / 2.
What are the conditions for using the Heron formula?
The Heron formula assumes the triangle is valid, meaning the sum of the lengths of two sides must be greater than the length of the third side.
Can I use this calculator for irregular triangles?
Yes, this calculator can be used for irregular triangles, as long as the lengths of the three sides are known.
What is the perimeter of a triangle?
The perimeter is the sum of the lengths of the three sides of the triangle.
What is the semi-perimeter?
The semi-perimeter is half the perimeter of the triangle, calculated by dividing the sum of the sides by 2.