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17 January, 05:17

How to express the area of an equilateral triangle in terms of its side?

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  1. 17 January, 05:35
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    Let the side be x and the altitude be a

    a^2 = x^2 - (0.5x) ^2

    a^2 = 0.75x^2

    a = sqrt0.75 x

    so the area = 0.5x * a = 0.5x * sqrt0.75 x^2 = 0.433x^2
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