The question cannot be answered.
If AB is a line segment then A and B are normally the end-points of that segment. If A and B are points then A cannot be 5 and B cannot be 30 degrees. If A and B are not end-points of a line segment, it is not at all clear from the question what they are and how they relate to the line segment, AB.
Compliment of 60 degrees is 30 degrees.
180 - 30
60 degrees
60 degrees
180 - 30
30 degrees
105 degrees
Compliment of 60 degrees is 30 degrees.
A circular line 30 degrees north of the equator and another [parallel] one 30 degrees south.
30 degrees
90 - 30 = 60 degrees.
180 - 30
60 degrees
60 degrees
60 degrees
There is a 30 degrees line of latitude north of the Equator (just above the Tropic of Cancer), and a 30 degrees line of latitude south of the Equator (just below the Tropic of Capricorn). So 30 degrees latitude appears in both the Northern Hemisphere, and the Southern Hemisphere.
180 - 30