For this case we have that the figure shown consists of 7 sides.
Then a regular heptagono is observed (the sides are equal). By definition, we have that the sum of the internal angles will be given by:
![(n-2) * 180](https://img.qammunity.org/2020/formulas/mathematics/middle-school/d8j3m8v0g2vcfo0m7rfdkdbcmfxn3fcjhr.png)
Where:
n: It is the number of sides
Substituting:
![(7-2) * 180 = 5 * 180 = 900](https://img.qammunity.org/2020/formulas/mathematics/middle-school/33bzfdphxlls6u1xifz6n44lsulqy7zu1i.png)
Answer:
Option D