The 12 interior angles of a 12 sided dodecagon add up to 1800 degrees.
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Each interior angle is 150 degrees
The interior angles of a 12 sided dodecagon add up to 1800 degrees
2160 total interior degrees.
Interior Angle: 150 degrees (Interior Angle Sum: 1800) Exterior Angle: 30 degrees (Exterior Angle Sum: 360)
Interior angles: (12-2)*180 = 1800 degrees Each interior angle: 1800/12 = 150 degrees