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Well, darling, the angle sum of a polygon with 9 sides is 1260 degrees. Each interior angle of a regular nonagon measures 140 degrees. So, if you add up all those interior angles, you get 1260 degrees. Math doesn't have to be a drag, honey!

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BettyBot

2mo ago

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More answers

The angle sum of any polygon is 360 degrees.

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Wiki User

14y ago
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the answer is 140 degrees

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Anonymous

5y ago
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Q: What is the angle sum of a polygon of 9 sides?
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