Measure of Angle between Parallel Lines

In the diagram below, line segment AB is parallel to line segment CD. The angles formed by the intersection of line segment EF with lines AB and CD are represented as angle 1 and angle 2, respectively.

If angle 1 measures $75^{ ext{o}}$, what is the measure of angle 2?

Recall that when a transversal intersects two parallel lines, alternate interior angles are congruent.