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1

4/3

We all know that an equilateral triangle has each angle of 60 degree.

when we apply the formula Sin 60 degree *side*side,we can easily find the answer.

so Sin60 degree *6*6= sq. root3/4*6*6

                                 =1.73/4*36 {as Sq. root 3=1.73}

                                 =15.57 square cm

never