NCERT Class 9 Solutions: Line and Angles (Chapter 6) Exercise 6.2 – Part 1
Q1 In the figure, find the value of and and then show that
Solution,

Give line of AB and CD and it is parallel to each other. Also give angle x and y
(Linear pair) also, (Vertically opposite) Now, (Alternate interior angles)

Alternate interior angles are equal.Therefore
Q2 In the figure, if and , find x.
Solution:

Given, and

Now, (Angles on the same side of transversal.)also, (Corresponding angles) and, (Linear pair)

Equation, and ° and

Now,