Answer: 1=120, 2=60, 3 =120, 4=60, 5=120, 6=60, 7=120, 8=60
Step-by-step explanation: line j is 180 degrees, so 1 will be 180 - 60 =120 degrees.
Logically, 3 must be 120, 4 must be 60, 5 must be 120 and 6 must be 60.
8 = 60 and 7 = 120
Of course, you can double check this, as line f is also a straight line of 180 degrees. So 1 and 4 also have to add up to 180 degrees, and they do.