NCERT Class 9 Solutions: Line and Angles (Chapter 6) Exercise 6.1 – Part 1
Q1 In the figure line interact at O. If and find and reflex
Solution:
Given, in fig.point of A, B, C, D, E, O on the plane AB and CD interact with O


Equation,
(Forms a straight line) also, (Forms a straight line)
Q2 In figure, lines XY and MN intersect at O. If , find c

Given, in figure X,Y,M,N,P at angle of a, b, c, o

and

equation,

Let a be then will be
Also, (Linear Pair)