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13 January, 06:05

What is the area of a regular pentagon with 7 inch sides and an apothem of 3.9 inches?

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  1. 13 January, 09:45
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    A (n) = (ns^2) / (4tan (180/n)) in this case:

    a = (5*49) / (4tan36)

    a=84.3in^2
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