Parallel lines p, q and r are cut by transversal t. Which of these describes how to find the value of x 1. Lines p and t are parallel, so the alternate exterior are congruent; x = 130

2. Lines q and r are parallel, so the interior angles are supplementary; x = 130

3. Lines p and r are parallel, so they alternate exterior angles are supplementary; x = 50

4. Lines q and r are parallel, so the corresponding angles are congruent; x = 50