You need to identify that number of sides of the polygon. In this case it has 12 sides.
In order to find the measure of the interior angles of a polygon, you can use the formula shown below:

Where "n" is the number of sides of the polygon.
In this case you know that:

Finally, substituting the value of "n" into the formula and evaluating, you get the following result:

Since it is regular, all the interior angles have equal measure.
Therefore, the answer is:
