If the area of a equilateral triangle is 81 root 3 cm 2 , find its perimeter
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area =√3/4a^2 = 81√3
a^2 = 81*4
= 324
a= 18
perimeter = 3*a =3*1 8=54cm
a^2 = 81*4
= 324
a= 18
perimeter = 3*a =3*1 8=54cm
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