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In an equilateral triangle, 3 coins of radii I unit each are kept so that they touch each other and the sides is the triangle. Find the area of the triangle. In an equilateral triangle, 3 coins of radii I unit each are kept so that they touch each other and the sides is the triangle. Find the area of the triangle.
From figure, side of the equilateral triangle= 2rwhere r is the radius of each coin.From trignometry, the side AD=Therefore, area of the triangle=
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