Complete the twocolumn proof Solutiontwo lines are parallel

Solution

two lines are parallel if they’re cut by a transversal such that

Two corresponding angles are congruent. angle 1 = angle 5, angle 2= angle 6

Two alternate interior angles are congruent. angle 4 = angle 5, angle 3= angle 6

Two alternate exterior angles are congruent.

Two same-side interior angles are supplementary.

Two same-side exterior angles are supplementary.