NCERT Class 9 Solutions: Line and Angles (Chapter 6) Exercise 6.1 – Part 2 (For CBSE, ICSE, IAS, NET, NRA 2023)

Doorsteptutor material for CBSE/Class-9 is prepared by world's top subject experts: get questions, notes, tests, video lectures and more- for all subjects of CBSE/Class-9.

Q-3 In the figure, , then prove that

Point of P, Q, R, S, T and Triangle PQR


In figure give point of P, Q, R, S, T and

To prove,


(Linear Pair)

… equation (1)


(Linear Pair)

… equation (2)

From (i) and (ii)


Q-4 In the figure, if then proves that AOB is a line.

Point of a, B, C, D and Angle of W, X, Y, Z

Given, point of A, B, C, D and angle of w, x, y, z


(Angles around a point)

Hence, makes a linear pair. Therefore, AOB is a staright line.