Which pair of angles are alternate exterior angles?
a <1 and <8
b <1 and <7
c <2 and <7
d <2 and <9

Answer:
Angles <2 and <7 are alternate exterior angles
Step-by-step explanation:
Please refer to the attached picture: Notice that the angles <2 and <7 are formed by a transversal line (depicted in orange) that crosses two parallel lines (depicted in green). Not only that, those angles comply with the definition of alternate external angles, since: 1) they have distinct vertices, 2) they are on the opposite sides of the transversal, and 3) they are exterior to the parallel lines.