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:
![InteriorAngle=(180(n-2))/(n)](https://img.qammunity.org/2023/formulas/mathematics/college/5sbrqx4gbm2f3i8b5skfp8x9kxsh1hj67s.png)
Where "n" is the number of sides of the polygon.
In this case you know that:
![n=12](https://img.qammunity.org/2023/formulas/mathematics/high-school/l6xrfmvkmidxtlqqijnqsox8k8056o0r6r.png)
Finally, substituting the value of "n" into the formula and evaluating, you get the following result:
![\begin{gathered} InteriorAngle=(180(12-2))/(12) \\ \\ InteriorAngle=(1800)/(12) \\ \\ InteriorAngle=150\degree \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/xo5p1cuua08an5wirq1e00ad3lpu59ip9l.png)
Since it is regular, all the interior angles have equal measure.
Therefore, the answer is:
![150\degree](https://img.qammunity.org/2023/formulas/mathematics/college/v5bneq4cn6xmphsxhyootyyq7fs86zwz00.png)