sum of adjacent angles on a straight line

Author:
Mathguru
Topic:
Angles
We can clearly see two lines. One is blue and the other one is black. We can change the position of these two lines with free points A, B, C and D. We can see that the two lines are intersecting and making two adjacent angles α and β. Let us move the free points A, B, C and D and observe how these two angles get changed.
Questions to think about 1. Move the points A, B, C and D and find α+β, what do we observe? 2. Is it possible to get α+β ≠180˚?