Question

Choose the correct phrase to complete the statement proving that lines a and b are parallel A corresponding angles are congruent. B corresponding angles are supplementary. C same side interior angles are supplementary. D same side interior angles are congruent. E alternate interior angles are congruent. F alternate interior angles are supplementary

Answer 1

If two angles are cut by a transversal so that the "alternate interior angles are congruent, then the lines are parallel.

The correct answer is option E.