NCERT Class 9 Solutions: Line and Angles (Chapter 6) Exercise 6.1 – Part 2

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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.