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ANSWER:  12 \sqrt{3}

Let a be the length of a side of equilateral triangle.

Area of Equilateral triangle =  \frac{ \sqrt{3} }{4} a ^{2}

Perimeter of Equilateral Triangle = 3(a)


Area of Equilateral Triangle = Thrice its Perimeter

 \frac{ \sqrt{3} }{4} a ^{2} =3(3a)

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