angles around a transversal

In the applet, line a is parallel to line b. There is nothing movable in this applet. Based on the last two explorations in this section, pair up the angles in any way that might seem reasonable. For instance, in the last two applets, we related angles that are in the 2 and 6 spots and the 4 and 6 spots. Can you relate other angles in the same way? Can you relate angles in different ways? If so, justify why you are relating them in that way. Talk it out.