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OpenStudy (anonymous):
What is the area of a regular pentagon with side length 4 cm? Round your answer to the nearest tenth.
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OpenStudy (anonymous):
the formula for finding the area of a pentagon is \[\frac{ 5 }{ 2 }sa\], or 2.5 x side x apothem. the apothem is the line drawn from the middle of any side to the center of the pentagon. if you can figure out the apothem, you pretty much have your answer.
OpenStudy (anonymous):
What is the apothem?
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