Exterior angles add up to 360 degrees
Interior angles add up to 17,640 degrees
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Sum of interior angles of n-sided polygon = 180n - 360 degrees. When n = 20 this gives 3240o
Sum of exterior angles = 360 degrees Sum of interior angles = 1440 degrees
360 degrees
The sum of the exterior angles is always 360 degrees.
The sum of the exterior angles of any polygon, including a 27 sided one, is 360 degrees.