To learn more about Triangles enrol in our full course now. If you do not know the height of the triangle but know the lengths of all the sides of the triangle then you can calculate its area using the Herons formula. Herons formula is also a special case of the formula for the area of a trapezoid or trapezium based only on its sides.
Herons formula is obtained by setting the smaller parallel side to zero.
Lines and Angles - Types of Angles. Herons formula states that area of a triangle the lengths of whose sides are a b and c is given as. Herons formula is obtained by setting the smaller parallel side to zero. If indeed the triangle is equilateral then abc and then Herons simplifies to.