Question

The area of an equilateral triangle is 36`sqrt3` sq. cm. Find its perimeter.

Answer 1

Area of an equilateral triangle is given by

`sqrt3/4 xx ("side" )^2` = A

`sqrt3/4 xx ("side" )^2 = 36sqrt3`

            (side)² = 144 

              side = 12 cm

Hence
perimeter = 3 x ( its side )

                = 3 x 12

                = 36 cm