Remember that
The sum of the interior angles in any polygon is given by the formula
![S=180^o(n-2)](https://img.qammunity.org/2023/formulas/mathematics/college/mg12xat1sts3rlho3lax2k5v54d4kgggfu.png)
where
n is the number of sides of the polygon
In this problem
n=15
substitute
![\begin{gathered} S=180^o(15-2) \\ S=2,340^o \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/ivb9691knh1n3pdpqgnegpxfann4jehgpz.png)
Divide by the number of sides to obtain the measure of each interior angle
![(S)/(n)=(2,340)/(15)^o=156^o](https://img.qammunity.org/2023/formulas/mathematics/college/vmgyd26hk6lqi1o2vq225wqrgdfihzysps.png)
The answer is 156 degrees