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:
[tex](n-2) * 180[/tex]
Where:
n: It is the number of sides
Substituting:
[tex](7-2) * 180 = 5 * 180 = 900[/tex]
Answer:
Option D
