SOLUTION: find the number of sides in a polygon whose interior angles are in arithmetical progression. the smallest being 120° and the common difference 5 °

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Question 984028: find the number of sides in a polygon whose interior angles are in arithmetical progression. the smallest being 120° and the common difference 5 °
Answer by MathTherapy(10553) About Me  (Show Source):
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find the number of sides in a polygon whose interior angles are in arithmetical progression. the smallest being 120° and the common difference 5 ° 
Number of sides: highlight_green%289%29