Find the height of an equilateral triangle whose perimeter is 66cm. Hence or otherwise calculate its area.
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height is 11root3 and area is 242root3
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perimeter =66cm so the side of the triangle = 66/3=22 cm as all the sides are equal in equilateral triangle . now use herons formula to calculate area of the triangle. now you got the area ,so find height by using the formula area of triangle =0.5× base × height
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