» Area of a triangle calculator (Heron's formula)

Area expresses the extent of a two-dimensional shape, in the plane. Circle, ellipse, parallelogram, rectangle, rhombus, sector, square, trapezoid, triangle. Surface area expresses the extent of a two-dimensional surface of a three-dimensional object. Cone, cube, cuboid, cylinder, sphere, tetrahedron.

Initial Data



\begin{align} A &=\sqrt{s \times (s-a) \times (s-b) \times (s-c)} \\ s &=\frac {a+b+c}{2} \\ \end{align}


Edge (a)
Edge (b)
Edge (c)