Question

2. The area of an equilateral triangle is 81√3 sq cm. Find the perimeter of the triangle.

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Answer 1

Answer:

Step-by-step explanation:

let the side of an equilateral triangle =a

area of an equilateral triangle = 81√3 cm²

√3*a²/4 = 81√3

a²/4 =81

a² = 324

a= 18

Perimeter of a triangle = 3*a

                                      = 3*18

                                       =54 cm

Answer 2

Answer:

54 cm

Step-by-step explanation:

Area of equilateral triangle = 81√3

√3/4×a^2 = 81√3

a^2 = 81√3×4/√3

a^2 = 124

a = √124

a = 18

Perimeter of Equilateral triangle = 3a

= 3×18

= 54 cm