Your answer will be D.
So, you have the angles 12, 9, 6, and 3. You may see that the place that 6 is makes this a non perfect square. When you have this problem simply add the number on top of it with the number that makes this problem.
For instance...
![\boxed{6+3=9}](https://img.qammunity.org/2021/formulas/mathematics/high-school/2d0cg8zff90kmskgmg81vt9e50di0jv0n1.png)
So, when finding area you must multiply the 2 lengths with each other.
So here our bottom length is also 12. Thus, we must multiply 9 and 12 together.
For instance...
![\boxed{9*12=108}](https://img.qammunity.org/2021/formulas/mathematics/high-school/leeaj6592zuu33r5e1ccika9u3fj376pel.png)