Answer:
a. there's a lot of options but here are a few: 1 and 5, 5 and 6, 2 and 1, 2 and 6
b. also a lot of options but here are a few: 1 and 6, 5 and 2, 3 and 8, 4 and 7
Explanation:
supplementary angles are two angles that add up to 180 degrees, so essentially two angles that, combined, are equal to a straight line.
vertical angles are angles that are opposite each other when two lines cross.