In this case, the polygon has 12 sides, then, we can use the following general rule for the sum of interior angles of a polygon with n sides:
![S=180\cdot(n-2)](https://img.qammunity.org/2023/formulas/mathematics/college/rtf2o0uz8gmtul4cav9edlyt3j1vzk82cx.png)
then, we have:
![S=180(12-2)=180(10)=1800](https://img.qammunity.org/2023/formulas/mathematics/college/173vzcxmgrqnpuqzad538patbclowrnks7.png)
therefore, the sum of interior angles is 1800.
Also, as a general rule for any polygon, the sum of exterior angles is 360 degrees