While a certain isotope decays, it emits photons. What kind of decay is happening? alpha decay beta decay gamma decay positron decay

Not the answer but here is the graph. 

The answer is oh i forgot 

Iwas in a argument about a certain class grade with my teacher. it was a ‘a-’when i felt that i deserved a ‘a’. i showed him (my teacher) why i felt i derserved so. i questioned what i got wrong and showed him what i learned. i look back to that teacher with nothing but love and support because that’s the class that i actually learned the most. the moral of the story is to see where the other person is coming from and what they have done. also, when in a conflict, never attack the persons character. this will just make the argument end poorly.

One of the angles would be 70 degrees and the other one would be 90 degrees