Answer to Question #128824 in Geometry for kern

Question

How to find the area of a triangle, knowing the lengths of all its sides?

Answer 1

If the lengths of all sides of the triangle are known, to calculate the area of the triangle it is convenient to use Heron's formula.

S=area of the triangle; a, b, c are lengths of sides,p=(a+b+c)/2, then

S=(p*(p-a)*(p-b)*(p-c))^(1/2) .