Alternate angles are angles that occur on opposite sides of the transversal line and have the same size. Alternate angles are equal: We can often spot interior alternate angles by drawing a Z shape. There are two different types of alternate angles, alternate interior angles, and alternate exterior angles.
In this situation a and 72 are alternate interior angles
We need to look at the y-coordinates to find the vertical distance. I see 2 and -9. We need to add 9 and 2 to get our answer. The vertical distance is 11.