Herons Formula ...

In figure, $$Ar(||gm ABCD)$$ is:

Two sides of a triangle are $$16 cm$$ and $$14 cm$$ and its semi-perimeter is $$18 cm$$. Then the third side of the triangle is:

Area of an equilateral triangle of side 'a' units can be calculated by using the formula :

Heron's formunla is :

Area of an equilateral triangle of side 'a' units can be calculated by using the formula :

The area of a triangle whose sides are $$13$$ cm, $$14$$ cm and $$15$$ cm is :

The lengths of four sides and a diagonal of the given  quadrilateral are indicated in  the diagram. If $$A$$ denotes the area and $$l$$ the length of the other diagonal, then $$A$$ and $$l$$ are respectively

Area of an equilateral triangle of side a units can be calculated by using the formula :

If the sides of a triangle are doubled, then its area

Area of triangle ABC whose sides are 24 m, 40 m and 32 m, is -