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Question
The area of an equilateral triangle is 36`sqrt3` sq. cm. Find its perimeter.
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Solution
Area of an equilateral triangle is given by
`sqrt3/4 xx ("side" )^2` = A
`sqrt3/4 xx ("side" )^2 = 36sqrt3`
(side)2 = 144
side = 12 cm
Hence
perimeter = 3 x ( its side )
= 3 x 12
= 36 cm
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