Find the area of equilateral triangle whose perimeter is 18 cm using Heron’s formula
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3a=18
a=6
s=a+b+c/2
=18/2
=9
ar=√s(s-a)(s-b)(s-c)
ar=√9(9-6)(9-6)(9-6)
ar=√9•3•3•3
ar=9√3cm^2
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mark saurabh Brailniest
his answer is right
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