EXERCISE 6.1
NCERT class 9 maths chapter 6 Lines and Angles
Question 1:In Fig. 6.13, lines AB and CD intersect at O. If Ð AOC + Ð BOE = 70° and Ð BOD = 40°, find Ð BOE and reflex Ð COE.
Exercise 6.1 maths class 9 Chapter 6 Lines and Angles
Question 2:In Fig. 6.14, lines XY and MN intersect at O. If Ð POY = 90° and a : b = 2 : 3, find c.
CBSE class 9 maths ncert solutions Chapter 6
Question 3:In Fig. 6.15, Ð PQR = Ð PRQ, then prove that Ð PQS = Ð PRT.
class 9 maths solutions Lines and Angles
Question 4:In Fig. 6.16, if x + y = w + z, then prove that AOB is a line.
NCERT class 9 chemistry chapter 6 exercise solutions
Question 5:In Fig. 6.17, POQ is a line. Ray OR is perpendicular to line PQ. OS is another ray lying between rays OP and OR. Prove that Ð ROS = 1 2 (Ð QOS – Ð POS).
Question 6:It is given that Ð XYZ = 64° and XY is produced to point P. Draw a figure from the given information. If ray YQ bisects Ð ZYP, find Ð XYQ
and reflex Ð QYP.