Heron’s Formula gives the area of a triangle when we know all three sides.
The area is calculated from the semiperimeter of the triangle, s and the length of the sides (a, b, and c).
First, we calculate the semiperimeter s.
Now we apply Heron’s formula:
The area of the triangle is 6 cm2.
Applying Heron’s formula, we have seen that its area is 6 cm2.
We also know that the area of a triangle is:
With this formula we can calculate the altitude:
That is h = 2.4 cm.
Circumscribed Circle in a Triangle
Inscribed Circle in a Triangle
Table of Triangle Area Formulas
You can see the table of triangle area formulas. Depending on the type of triangle you may need one element, like in the equilateral triangle, two (base and altitude) or three. In this latter case, provided it is not its three angles.
AUTHOR: Bernat Requena Serra