Exterior angles add up to 360 degrees
Interior angles add up to 1800 degrees
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The general formula for the sum in degrees of the interior angles of a regular polygon with n sides is 180(n - 2). The name "dodecagon" means a polygon of 12 sides. Therefore, the sum of the angles is 1800 degrees.
12
12 The sum of the exterior angles is 360˚. So we have 360/30 = 12 angles which is also the number of the polygon sides.
The interior angles of a 12 sided polygon add up to 1800 degrees
A dodecagon