Herons Formula ...

The adjacent sides of a parallelogram are 8 cm and 9 cm. The shorter diagonal is 13 cm. What is its area?

The sides of a triangle are $$5 cm$$, $$12 cm$$ and $$13 cm$$, Then its area is

The area of a triangle, whose sides are $$4 cm$$, $$13 cm$$ and $$15cm$$, is

ABCD is a given field whose sides are indicated. If $$\angle$$DAB = 90$$^o$$, then area of the field is ............

The base of an isosceles triangle is $$16$$ cm and its perimeter is $$36$$ cm. The area of the triangle is ........

The sides of a triangle are $$3$$ cm, $$5$$ cm and $$4$$ cm: Its area is

The area of triangle with sides $$35$$ cm, $$66$$ cm and $$53$$ cm is

Find the area of a rhombus with sides 20 cm and length of one of the diagonal as 28 cm.

The area of triangle whose sides are 4cm, 13 cm and 15 cm is

What is the area of a triangle whose sides are $$3\ \mathrm{cm}$$ , $$5\,\mathrm{ cm}$$ and $$4\,\mathrm{ cm}$$?