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10 August, 23:47

How to find the area of a equalateral triangle using the height?

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  1. 11 August, 01:52
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    If the side of the triangle is a, the height is given by √a²-a²/4=√ (¾a²) = a√3/2.

    So if you know the height, h, work out 2h/√3 to find the side a.

    The area is ½ah=½ (2h/√3) h=h²/√3 which can be written h²√3/3.
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