Answer:
q = 40 degrees
r = 60 degrees
p = 100 degrees
Explanation:
before we start we need to know that angles on a straight line equal 180 and angles in a triangle add up to 180.
by knowing this we can workout
q= 180 - 140 = 40 therefor q = 40 degrees
r= 180-120=60 therefor r = 60 degrees
p = 180 - q - r
180 - 40 - 60 = 100 therefor p = 100 degrees