Question

The of an equilateral triangle is 81 √3 sq.cm.Find the perimeter of the triangle?​

Answer 1

Step-by-step explanation:

Therefore, the perimeter of the equilateral triangle is 54 cm.

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Answer 2

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Area of an equilateral △=

$81 \sqrt{3 \: {cm}^{2} } \\∴ \frac{ \sqrt{3} }{4} {a }^{2} = 81 \sqrt{3} \\ \: \\ \ {a }^{2} = 81 \times 4 \\ \\ a = 18 \\ \\ Perimeter \: of \: an \: equilateral \\  △=3a \\ =3×18 \\ =54cm$