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OpenStudy (anonymous):
Calculate the measure of a central angle of a regular nine-sided polygon. HELP PLEASE.
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OpenStudy (shubhamsrg):
9 sides will substend 9 equal angles at the center. now sum of all these angles would be 360 let the angle we x so we have x+x+x...9 times = 360 or 9x = 360 just solve for x
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