Compare the F to the C in the first triangle because they are the ones that are supposed to be congruent. The coordinates of the other points are pretty much just there to confuse you. Hope that helped somewhat. ( Don't forget to draw things out )
Here, angle 1 and angle 2 are congruent (as they are equal in magnitude ) because they are a pair of corresponding angles (as they are at same location on transversal line)