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OpenStudy (anonymous):
Find the area of a regular pentagon to the nearest tenth of a square centimeter if the apothem measures about 6.9 cm and each side measures 10 cm. I used the formula; A=1/2as and got 34.5 as my answer. I'm not really sure if it's correct. Next one; the circular moat should have been a circle of radius 10 meters instead of radius 6 meters, how much greater should the larger moat's circumference have been?
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