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More Lessons for Grade 9 Math

Math Worksheets

Videos, worksheets, solutions, and activities to help Geometry students learn about interior angles of polygons.

Find the Interior Angle Sum of a Polygon

How to find the interior angle sum of a polygon

Students learn the definition of a regular polygon, as well as the following formulas related to regular polygons. The measure of each interior angle of a regular polygon is always 180(n -- 2)/n degrees, where n represents the number of sides of the polygon.

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