Unit-12 Mensuration

In this unit you will learn rules of measurement of length, area and volume.

The sides of a triangular field are 165 m., 143 m. and 154 m. Find the area of the field?

Answer

Here s = (165 + 143 + 154)/2 = 231 m

Using Hero’s formula Area = √(231(66)(88)(77)) m2 = √(11 × 97 × 3 × 3 × 2 × 11 × 2 × 2 × 2 × 11 × 7 × 11)m2 = 11 × 11 × 7 × 3 × 2 × 2 = 10164 m2