Herons Formula ...

Find the area of the parallelogram with sides $$9 cm$$ and $$11 cm$$ and one of the diagonals as $$14 cm. $$

The parallel sides of a parallelogram are $$60$$m and $$25$$ m and one of the diagonals is $$65$$ m. Find the area of the parallelogram, 

The perimeter of a triangular field is $$420$$ m and its sides are in the ratio $$6: 7: 8$$ Find area of the triangular field.

Find the area of an equilateral triangle each of whose side is 4 cm long?

A triangular park in a city has dimensions 100m X 90m X110m.A contract is given to a company for planting grass in the park at the rate of Rs.4000 per hectare.Find the amount to be paid to the company.(Take $$\sqrt{2}=1.414$$)

Find the area of a triangle whose two sides are $$8$$ cm and $$11$$cm and the perimeter is $$32$$cm.

One side of an equilateral triangle measures $$8$$ cm. Find its area using Heron's formula. What is its altitude

The perimeter of a triangle is $$300m$$. If its sides are in the ratio $$3:5:7$$. Find the area of the triangle.

Find the area of a triangle whose sides are 9 cm, 12 cm, and 15 cm.

The perimeter of a triangle field is $$450\ m$$ and its sides are in the ratio $$25:17:12$$. Find the area of the triangle.