Question

In Fig. 10.130, if l1 || l2, what is the value of y?​

Answer 1

Answer:

X =3x (alternative interior angle)

Y+x =180

Y+ 3x =180............. 1

Y+x =180 divided by 3

X=60

Put value of x in 1

Y+60 =180

Y =120°

Answer 2

Answer:

135

Step-by-step explanation:

Angle 1 is equal to x ( Alternate Interior angles )

Now, x + 3x = 180

=> 4x = 180

=> x = 45

Also, x + y = 180

=> 45 + y = 180

=> y = 135