Each exterior angle measures 30 degrees
Each interior angle measures 150 degrees
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the center angle of any polygon is 360 degrees
To calculate the measure of a central angle of a regular nine-sided polygon, divide 360 degrees by the number of sides. In this case, divide 360 by 9. The measure of the central angle of a regular nine-sided polygon is 40 degrees.
The interior angle of a regular polygon with x sides is 180(x-2)/x. As a result, each angle of a regular 50-sided polygon is 172.8. The exterior angles are 7.2
Total 1440o; if regular, each angle = 144o
5 degrees