# What is the sum of the interior angle measure of a 13 sided polygon?

1980 degrees.

### The measure of an interior angle of a regular polygon is 150 degrees Find the number of sides?

Answer It is Dodecagon. To find this, you have to first find the exterior angle of the polygon. Since the exterior angle of a polygon is always supplementary to the interior angle, you subtract the measure of the interior angle from 180. 180-150=30. Now You divide 360 by the measure of the exterior angle to get the number of sides of the polygon. 360/30=12. A 12-sided polygon is called a dodecagon