Question

find the lettered angles in each case​

Answer 1

Answer:

y+120=180(linear pair)

y=60

x=40+60

x=100

Answer 2

Answer:

<y = 180 -120 =60 degree ( linear pair)

<ACB+40 degree = 120 degree (exterior angle property of triangle)

or,<ACB= 120-40=80 degree

X+80 degree= 180 degree (linear pair)

or, X= 180-80 =100 degree

hope it helps you