Answer:
Step-by-step explanation:
40 + x + 80 = 180 degree (being linear pair)
120 + x = 180
x = 180 - 120
x = 60 degree
y + 120 = 180 degree (being linear pair)
y = 180 - 120
y = 60 degree
70 + 50 + z = 180 degree (being linear pair)
120 + z = 180
z = 180 - 120
z = 60 degree
x + y + z = 180 degree (being linear pair)
Note : A linear pair is a pair of adjacent angles formed when two lines intersect.
