∠DOC, ∠COB and ∠BOA
1) To name all the angles, we need to write this way:
1.2) The name of the angle starts with the point, the vertex, and the endpoint. This way:
In this picture, we have the following angles (left to the right)
∠DOC Always in capital letters
∠COB
∠BOA
Note that the vertex is always at the middle, between the endpoints.
∠COB is the same angle as ∠BOC the order of the endpoints make no difference.
2) Hence, the answer is:∠DOC, ∠COB and ∠BOA