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OpenStudy (anonymous):
A regular octagon has side length 10.9 in. The perimeter of the octagon is 87.2 in cm and the area is 392.4 in2. A second octagon has side lengths equal to 21.8 in. Find the area of the second octagon. Round to the nearest hundredth. Answer 261.60 in2 1569.60 in2 317.06 in2 142.66 in2
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