Question

if the area of an equilateral triangle is 81 to the power square 3 cm square find its perimeter

Answer 1

Area of equilateral triangle = side² × √3/4

Here,

81√3 = side² × √3/4

81 = side² × 1 /4

81 × 4 = side²

√324 = side

18 = side

===================

Perimeter of equilateral triangle = 3×side

Perimeter of equilateral triangle = 3×18

Perimeter of equilateral triangle = 58 cm


I hope this will help you

(-:

Answer 2

Hi Friend !!!

Here is ur answer !!!

Area of equilateral triangle = side ² ×√3/4

Let's take side as a

81 = a² √3/4

81×√3 ×4/√3 = a²


81×4 = a²

a = √81×4

a = 9×2

a = 18

======================

Perimeter of equilateral triangle = 3a

= 3(18)

= 54


Hope it helps u : )