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OpenStudy (anonymous):

I really need help understanding the Polygon-Angle Sum Theorems!!! I'm on a strict deadline. So, I did one problem. What is the measure of one interior angle of a regular 12-gon? I learned that the number of triangles is always two less than the sides. So, for this particular problem there are 10 triangles. 10 times 180 degrees = 1800 degrees. Did I do it right? Or did I find the sum of the interior angle measures rather than just the one I needed?

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