Answer:
1 and 7
2 and 8
Explanation:
consecutive exterior angles theorem- a theorem stating that if parallel lines are cut by a transversal line, then consecutive exterior angles are supplementary. Like 1 and 7(they are both exterior angles); these angles are both right angles, so added together would make them a pair of supplementary angles.
supplementary angles- a pair of angles that add up to 180 degrees when added together.
I hope this helps