top: 132º
bottom: 48º
The degrees across a line is a total of 180º.
To get the two missing degrees, subtract both of the known degrees from 180.
180-48=132
180-132=48
So, the top missing angle would be 132º and the bottom missing angle would be 48º.
The other way to do this would be that since we know that its a traversal inside a pair of parallel lines, we know that 48+132=180 so, the missing angles would be 48 & 132, 132 & 48.
Hope that makes sense.
Let me know if you need anything else! :)