150.
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Each interior angle is 150 degrees
360/12 = 30 degrees
Interior angles: (12-2)*180 = 1800 degrees Each interior angle: 1800/12 = 150 degrees
150
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.