Angle 1 = 100 degrees
Angle 3 = 30 degrees
---Angle 3 is a central angle because it goes through the center of the circle
Angle 4 = 150 degrees
---Angles 3 and 4 are a linear pair
Angle 2 = 80 degrees
---Angles 1 and 2 are a linear pair
Hope this helps!
