Question

what is the measure of each interior angle of a regular, 12 sided polygon?

Answer 1

Interior angle for all polgyons always equal 360 degress.

12 corners in a regular 12 sided polygon, so 12 corners. Regular indicates all sides equal size and separation by angle. So to get your interior angle, divide 360 by 12.

To get the exterior angle, subtract the interior angle you just found from 180.