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OpenStudy (anonymous):
What is the area of a regular octagon with a side of 6.5 and an apothem 5?
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OpenStudy (nali):
here is a video that has different numbers but the problem is very similar to urs http://www.youtube.com/watch?v=ETM4JfK76Bc&feature=results_video&playnext=1&list=PL2455E582421B3BA5 hope this helps...
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