SOLUTION: find the area of a regular octagon of sides 4cm to 5 significant figures?

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Question 600010: find the area of a regular octagon of sides 4cm to 5 significant figures?
Answer by Alan3354(69443) About Me  (Show Source):
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find the area of a regular octagon of sides 4cm to 5 significant figures?
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For any regular polygon with n sides of length s:
Area+=+ns%5E2%2Acot%28180%2Fn%29%2F4