Answer:
angle b is 135 degrees
Step-by-step explanation:
lets work backwards to solve this
if angle c is 45, c is vertical to angle a, and we know vertical angles equal each other, we can reduce that angle a equals 45
if angle a is supplementary to angle b, and we know angle a is 45 degrees, we can make the equation 45+b=180. subtracting 45 from 180, we get 135 degrees for angle B
