Question

If the area of an equilateral triangle is 81 V3 cm”, find its perimeter.

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Answer 1

answer:

P≈41.03

A Area

81

explain : I hope it's helpful

Answer 2

let the side be a .

area of equilateral triangle= √3 a²/4

81 √3 = √3a²/4

a² = 81√3 × 1/√3 ×4

a² = 324

a= 18

perimeter of equilateral triangle = 3a = 54 cm