what is the area of an equilateral triangle who's side is 7cm
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area=3/4×7×7
=21.21 (approx )cm 2
=21.21 (approx )cm 2
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root3/4 X a2 (square)
=root3/4 X 49
49root3/4
=root3/4 X 49
49root3/4
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