SOLUTION: Find the area of a regular 20-gon with sides of length 26. (Round to 2 decimal places)

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Question 728726: Find the area of a regular 20-gon with sides of length 26. (Round to 2 decimal places)
Answer by Alan3354(69443) About Me  (Show Source):
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Find the area of a regular 20-gon with sides of length 26. (Round to 2 decimal places)
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Area+=+ns%5E2%2Acot%28180%2Fn%29%2F4 n = # of sides, s = side length
Area+=+20%2A26%5E2%2Acot%289%29%2F4
= 3380*cot(9) sq units
=~ 21340.48 sq units