What is the inverse of the following statement? "If the alternate interior angles are congruent, then the lines are parallel."
If the lines are parallel, then the alternate interior angles are congruent.
If the lines are not parallel, then the alternate interior angles are not congruent.
If the alternate interior angles are congruent, then the two given lines have to be parallel.
If the alternate interior angles are not congruent, then the lines are not parallel.