Question

. If the area of an equilateral triangle is 81√3 cm2
, find its perimeter?

Answer 1

Area = 81√3

a²√(3)/4 = 81√3

a² = 81√3 * (4/√3)

a² = 81*4

a = √(81) * √(4) = 9 * 2 = 18 cm

Perimeter = 3a = 3*18 = 54 cm

Answer 2

hope help u see above Sol..