I’m not sure why you’re having trouble with this simple question.. but I’ll help.
All you have to do is add both degrees to each other if they’re on the opposite side of the equator. (0 degrees) And if they’re on the same side of the equator subtract the smaller number from the bigger number. So the answers in order should be 120 degrees 130 degrees 30 degrees Hopefully this helps!
There has to be a picture or illustration attached to this question. Perhaps a picture displaying lines. You cannot find the answer with that information
