SOLUTION: What is the measure of a vertex angle in a regular polygon with 9 sides?

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Question 268944: What is the measure of a vertex angle in a regular polygon with 9 sides?

Answer by Alan3354(69443) About Me  (Show Source):
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What is the measure of a vertex angle in a regular polygon with 9 sides?
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The sum of the exterior angles is 360 for all polygons.
360/9 = 40 degs
Interior angles = 180-40 = 140 degs each