This week I learned how to find the sum of the interior angles of a polygon. To find them you subtract 2 from the number of sides of the polygon and then multiply that by 180 degrees and that is the sum that all the interior angles should add up to. For example. Find the sum of a pentagon. A pentagon has 5 sides so 5-2=3 so 3×180=540. A common formula of this would be (n-2)x180. N being the number of sides of the polygon.
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