A 13 sided polygon interior angles add up to 1980 degrees
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It will have (1980+360)/180 = 13 sides
It will have (1980+360)/180 = 13 sides
The interior angles of a 13 sided polygon add up to 1980 degrees
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The sum of the measures of the exterior angles of any polygon, regular or irregular, is always 360 degrees. In a regular polygon with ten sides, each exterior angle measures 360 degrees divided by the number of sides, which in this case is 36 degrees. Therefore, the sum of the measures of the exterior angles of a regular decagon is 10 multiplied by 36 degrees, which equals 360 degrees.