Herons Formula ...

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

Find the area of the triangle having three sides given as $$5 cm, 6 cm$$ and $$7 cm$$.

The area of a triangle is $$\displaystyle 216cm^{2}$$ and its sides are in the ratio 3 : 4 : 5 The perimeter of the triangle is

The perimeter of a triangle field is $$144 m$$ and ratio of the sides is $$3 : 4 : 5$$. Then the area of the field is

State Heron's formula for area of a triangle.

The sides of a triangular board are $$13\ metres$$, $$14\ metres$$ and $$15\ metres$$. The cost of painting it at the rate of $$Rs. 8.75$$ per $$m^2$$ is

If each side of a triangle is doubled, than find the ratio of area of the new triangle than formed and the given triangle.

For a quadrilateral, with the $$4$$ sides given and with none of the angles $$90^o,$$ 

If A is the area of a triangle in $$\displaystyle cm^{2}$$, whose sides are 9 cm, 10 cm and 11 cm,then which one of the following is correct?

The sides of a triangle are 16 cm, 30 cm and 34 cm. Its area is