Which lines are parallel? Justify your answer.

Lines a and b are parallel because their alternate exterior angles are congruent.
Lines a and b are parallel because their same side exterior angles are supplementary.
Lines e and f are parallel because their alternate exterior angles are congruent.
Lines e and f are parallel because their same side exterior angles are congruent.

Which lines are parallel Justify your answer Lines a and b are parallel because their alternate exterior angles are congruent Lines a and b are parallel because class=