Question

Which pair
angles must be supplementary?
21
5
3 4

Answer 1

4 and 1

Step-by-step explanation:

Supplementary means the angle is 180 degrees so 4 is the only complete obvious 180 degree angle and 1 just cause i know it can't be 5.

Answer 2

Answer:

C. 4 and 5

I hope I was able to help.