I think it's 45 because 50+85=135
*Remember in total the sum of all angles must be equal to 180
So in order to find the missing angle subtract 180-135=45.
45 is the measure of the 3rd angle.
Hope I helped :)
C. Revising because it should be your last stage in the writing process before you publish
Chronological order
Hoped this help
With what cause I got you