(b) Thrice the measure of the original angle (a) One point (a) 38° Get here NCERT Book Class 9 Maths Chapter 6 in English in PDF format. A line joining two endpoints are called: a) Line segment. (c) 6 lines CF is normal between them. Class 10 Maths Solutions Chapter 15, Class 9 Maths Solutions Chapter 1 (a) They do not intersect each other when extended on either side (a) A line can be produced to any desired length. Find the measure of the angle which is complement of itself. 6.40, ∠X = 62°, ∠XYZ = 54°. (c) 50° If ∠AOC + ∠BOE = 70° and ∠BOD = 40°, find ∠BOE and reflex ∠COE. They want to divide it equally among themselves. Class 10 Maths Solutions Chapter 13 Important Notes on 9th Maths Chapter 6 Each of the alternate interior angles is equal. Substituting their respective values we get. Now, as the sum of the interior angles of the triangle. (c) Equal to 90 degrees So, AOC+BOE +COE = COE +BOD+BOE = 180° Students can access the NCERT MCQ Questions for Class 9 Maths Chapter 6 Lines and Angles with Answers Pdf free download aids in your exam preparation and you can get a good hold of the chapter. If ∠B = ∠C = 50°. (a) More than 90 degrees Now, for the linear pairs on the line XY-. substituting the values as given in the question we get. (d) corresponding, Question 8. (d) 60°, 40°, 80°, Question 10. Answer: (b) Through a given point, only one straight line can be drawn. (b) 300° (b) Through a given point, only one straight line can be drawn. Class 10 Maths Solutions Chapter 9 (a) Acute triangle A transversal intersects two parallel lines. Class 10 Maths Solutions Chapter 2 The measure of ∠BOC is (a) 40° (b) 65° (c) 115° Class 9 Maths Solutions Chapter 12 Prove that vertically opposite angles are equal. Teachoo is free. Login to view more pages. Get clarity on concepts like linear pairs, vertically opposite angles, co … So, ∠AOC + ∠BOE +∠COE = ∠COE +∠BOD + ∠BOE = 180°. (b) Four it is based on the law of reflection angle i (incident ray) = angle r (reflected ray). Question 1. If two straight lines are perpendicular to a line l, then they are. In the question, it is given that (OR ⊥ PQ) and ∠POQ = 180°, So, ∠POS + ∠ROS + ∠ROQ = 180°    (Linear pair of angles), Now, ∠POS + ∠ROS = 180° – 90°      (Since ∠POR = ∠ROQ = 90°), As ∠POS + ∠ROS = 90° and ∠QOS – ∠ROS = 90°, we get. (b) Complementary (c) They are parallel to the plane in which they lie Prove that ∠ROS = 1/2(∠QOS – ∠POS). X lies in the interior of ∠BAC. Class 10 Maths Solutions Chapter 7 (a) 15° If you have any query regarding Rajasthan Board RBSE Class 9 Maths Solutions Chapter 6 Rectilinear Figures Exercise 6.1, drop a comment below and we will get back to you at the earliest. If two lines intersect each other, then the vertically opposite angles are: We hope the given RBSE Solutions for Class 9 Maths Chapter 6 Rectilinear Figures Ex 6.1 will help you. Q.9: In the figure, if AB || CD || EF, PQ || RS, ∠RQD = 25° and ∠CQP = 60°, then find ∠QRS. 6.13, lines AB and CD intersect at O. (b) 29° Solution: From the diagram, we have (AOC +BOE +COE) and (COE +BOD +BOE) forms a straight line. (d) None of these, Question 5. Q.7: In Fig. Class 10 Maths Solutions Chapter 14 (b) Obtuse triangle If you have any query regarding NCERT Solutions for Class 9 Maths Chapter 6 Lines and Angles Ex 6.1, drop a comment below and we will get back to you at the earliest. NCERT Solutions for Class 9 Maths Chapter 6 Lines and Angles Ex 6.1. A4: The Class 9 Maths Chapter 6 – Lines And Angles help you learn various concepts regarding, angles, lines and other properties of the same. Students can do their revision by practising the questions here and score good marks. 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An exterior angle of triangle is 103° and two of its interior opposite angles are equal, find the angles. Class 9 Mathematics Notes – All Chapters. (c) One Clear all the fundamentals and prepare thoroughly for the exam taking help from Class 9 Maths Chapter 6 Lines and Angles Objective Questions. The angle of a triangle are (x – 40°), (x – 20°), (x/2 – 10). (d) None of these, Question 18. (c) 93° Solution: Since AB is a straight line, ∴ ∠AOC + ∠COE + ∠EOB = 180°. Required fields are marked *. (d) 150°, Question 9. 6.33, PQ and RS are two mirrors placed parallel to each other. Just like angle 1 and angle 2, angle 3 is incident ray and angle 4 is reflected ray. [Answer: 4 pieces of 60 angle and one piece of 120 angle]. [Answer: 51.5 and 51.5]. Sum of the measure of an angle and its vertically opposite angle is always. BE and CF are normals between the incident ray and reflected ray. (b) 30° (d) Perpendicular to each other, Question 17. Question 14. We hope the NCERT Solutions for Class 9 Maths Chapter 6 Lines and Angles Ex 6.1 help you. An incident ray AB strikes the mirror PQ at B, the reflected ray moves along the path BC and strikes the mirror RS at C and again reflects back along CD. (c) Right triangle Chapter-wise online tests are given below each chapter heading. (c) Three points Or, ∠ROS = ½ (∠QOS – ∠POS) (Hence proved). (c) Obtuse angle 8. Class 10 Maths Solutions Chapter 8 Q.1: In the figure, lines AB and CD intersect at O.