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Each central angle of a regular 9 sided polygon: 360/9 = 40 degrees
360 degrees ( all the way round the central point). However, for one given sector it is 360/12 = 30 degrees.
This figure is a regular 12-sided polygon. Find m<4
The interior angle and central angle are supplementary, that is they always add up to 180 degrees, while the exterior angle and the central angle will always be the same.