## CLASS 9 MATHS CHAPTER-6 LINES AND ANGLES

Exercise 6.1 Question 1. In Fig. 6.13, lines AB and CD intersect at O. If and, find and reflex. Solution:We are given thatand. We need to find. From the given figure, we can conclude thatform a linear pair. We know that sum of the angles of a linear pair is. or Reflex (Vertically opposite angles), or But, …