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583 Degrees are in a 20-Gon
12 exterior angles that add up to 360 degrees 12 interior angles that add up to 1800 degrees
3,960°
The sum of the exterior angles of any polygon is 360 degrees. So for a regular dodecagon (12-gon), each exterior angle is 360/12 = 30 degrees. And so, each interior angle is 180 - 30 = 150 degrees.
1980 interior degees