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10 February, 11:58

A regular 15-gon has a perimeter of 150 m. To the nearest tenth, what is the area of the figure?

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  1. 10 February, 12:07
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    In the problem, it was being highlighted that the polygon is a 15-gon which means it is a Pentadecagon which has a formula for the area shown below:

    A=15a²/8 (√3 + √15 + √2 √ (5+√5))

    A=15a²/8 (9.409)

    where a is the side measurement of the polygon

    To get value, we use the given perimeter such as

    Perimeter=15a

    150=15a

    a=10m

    Solving for the area:

    Area=15a²/8 * (9.409)

    = (15 * (10²) / 8) * (9.409)

    Area = 1,764.19 m²
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