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Let its side be a cm
then,its height =[root 3]/2*a
so, [root 3]/2*a = 9
a=18/[root 3]
area of triangle=1.732/4*18/1.732*
18/1.732=10.39
then,its height =[root 3]/2*a
so, [root 3]/2*a = 9
a=18/[root 3]
area of triangle=1.732/4*18/1.732*
18/1.732=10.39
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