lillmook39 lillmook39

15-06-2018
Mathematics

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Find the area of a regular nonagon with a side length of 7 and an apothem of 5

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jdoe0001 jdoe0001

15-06-2018

a NONA=9, nonagon has 9 sides, so it's perimeter is 7+7+7+7+7+7+7+7+7, or 63, and we know the apothem.

bearing in mind that the area of a regular polygon is
(1/2)ap a = apothem, p = perimeter

so in this case that'd be (1/2)(5)(63).

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