Proving Parallel Lines
Converse of Corresponding Angles: In a plane, if two lines are cut by a transversal so that a pair of corresponding angles is congruent, then the lines are parallel.
Converse of Alternate Interior Angles: In a plane, if two lines are cut by a transversal so that a pair of alternate interior angles is congruent, then the two lines are parallel.
Converse of Alternate Exterior Angles: In a plane, if two lines are cut by a transversal so that a pair of alternate exterior angles is congruent, then the two lines are parallel.
Find out more about parallel lines by reading the explanation below.
Practice: Answer the following exercises about parallel lines.