The famous formula of Heron connects the sides, $a,b,c$ of a triangle with the area, $A$ of the triangle, i.e.
$$ A = \sqrt{s(s-a)(s-b)(s-c)}$$
The famous formula of Heron connects the sides, $a,b,c$ of a triangle with the area, $A$ of the triangle, i.e.
$$ A = \sqrt{s(s-a)(s-b)(s-c)}$$