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the area of equilateral triangle is 25 root 3 cm2. find its perimeter

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Let the sides of the equilateral triangle be x cm.
so its area is (root3)/4 into x cm2
but its area is 25 root 35 cm2
so (root3)/4 x x = 25 root 35
(x2)/4 = 25
x2 = 25 x 4 = 100
so x = 10
sides of the triangle is 10 cm
so its perimeter is 30 cm.
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