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OpenStudy (anonymous):
HELP PLEASE :( An exterior angle of a regular polygon measures 30 degrees. What is the measure of an interior angle? A.) 30° B.) 60° C.) 120° D.) 150°
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OpenStudy (texaschic101):
interior angle and exterior angle are supplementary angles...they add up to 180. so...180 - 30 = your interior angle
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