Question

in the given figure AB||CD. what is the value of y

Answer 1

U sgould use corresponding angle

180−154
=26

Answer 2

The theorem used in the question are:
If the lines are parallel then the alternate interior angles are also equal.

In a triangle the exterior angle is equal to the sum of the two interior opposite angles.

Using these two theorems we can solve the given question.
Please refer the above photograph for the used process.

Hope this will be helping you.

WARM REGARDS
Sahil khirwal