Examine the diagram below and find the value of angle a and angle b

Answer:
50°, 105°
Step-by-step explanation:
a + 130 = 180 ( sum of angles on a straight line)
a = 180 - 130 = 50°
a + b + 45 = 180 ( sum of angles in a Δ)
30 + b + 45 = 180
75 + b = 180
b = 180 - 75 = 105°