Which pairs of angles are supplementary 30 and 60 70 and 110 50 and 50 or 20 and 80?

Supplementary angles are two angles that add up to 180 degrees. Among the pairs you listed, 70 and 110 are supplementary (70 + 110 = 180), and 20 and 80 are also supplementary (20 + 80 = 100). The pairs 30 and 60 (30 + 60 = 90) and 50 and 50 (50 + 50 = 100) are not supplementary.