NCERT Solutions for Class 9 Maths Chapter 6 Lines and Angles

NCERT Solutions for Class 9 Maths Chapter 6 Lines and Angles include answers to questions related to exterior angles, interior angles, angle sum property, transversal, parallel lines, and more. Many students find this chapter a little challenging because it has many axioms, theorems and definitions related to lines and angles. Our NCERT Solutions are the best study guide for Class 9 students as they include easy explanations, stepwise answers and complete solutions for every exercise question. Moreover, you can download our NCERT solutions for free and access them at any time you want. 

Chapter 6 of the Class 9 Maths NCERT textbook includes 3 exercises with 6 questions in each exercise. The main topics covered in this chapter are definitions and basic terms related to lines and angles, different types of angles like vertically opposite angles, alternate angles, etc, intersecting lines, parallel lines, pairs of angles, parallel lines and a traversal, angle sum property of a triangle, and lines parallel to the same line. Download our NCERT Solutions today and start practising exercise questions for Class 9 Maths Chapter 6. 

About NCERT Solutions for Class 9 Maths Chapter 6 Lines and Angles

Basic definitions for lines and angles:

• A line with two endpoints is called a line segment.
• A part of a line with one endpoint is called a ray.
• If three or more points lie on the same line, they are called collinear points, otherwise, they are called non-collinear points.
• An angle is formed when two rays originate from the same endpoint.
• When two angles have a common vertex, a common arm and their non-common arms are on different sides of the common arm, they are called adjacent angles. 

Important theorems:

• The sum of two adjacent angles on a line is 180°.
• If the sum of two adjacent angles is 180°, then the non-common arms
• of the angles form a line.
• If two lines intersect each other, then the vertically opposite angles are equal.
• If a transversal intersects two lines such that a pair of alternate interior angles is equal, then the two lines are parallel.
• If a transversal intersects two parallel lines, then each pair of interior angles on the same side of the transversal is supplementary.
• If a transversal intersects two lines such that a pair of interior angles on the same side of the transversal is supplementary, then the two lines are parallel.
• Lines which are parallel to the same line are parallel to each other.
• The sum of the angles of a triangle is 180º.
• If a side of a triangle is produced, then the exterior angle so formed is equal to the sum of the two interior opposite angles.

Important axioms:

• If a transversal intersects two parallel lines, then each pair of corresponding angles is equal.
• If a transversal intersects two lines such that a pair of corresponding angles is equal, then the two lines are parallel to each other.

Download NCERT Solutions for Class 9 Maths Chapter 6 Lines and Angles

You are just one click away from downloading exercise-wise online NCERT Solutions for Class 9 Maths Lines and Angles prepared by our experts. These solutions will make every question clear to you thereby enhancing your conceptual understanding of the chapter. Given below are the links where you can download the NCERT answers for Chapter 6 Lines and Angles. Take note of all the important definitions, theorems and axioms given above before you start practising the NCERT questions of this chapter. 

NCERT Class 9 Maths Chapter 6 Ex 6.1 Solutions - 6 Questions 

NCERT Class 9 Maths Chapter 6 Ex 6.2 Solutions - 6 Questions

NCERT Class 9 Maths Chapter 6 Ex 6.3 Solutions - 6 Questions

NCERT Solutions for Class 9 Maths Chapter 6 Lines and Angles FAQs

1. Why are NCERT Solutions for Class 9 Maths Chapter 6 Lines and Angles important? 

• Our online NCERT solutions for Grade 9 Maths Chapter 6 provide a complete understanding of the chapter. 
• You can revise all the concepts of the chapter with our solutions. 
• They are a great study resource for last-minute revision based on the latest CBSE exam pattern and syllabus. 
• You can study these NCERT solutions at your own pace and solve your doubts on your own.

2. Are all exercises of NCERT Class 9 Maths Chapter 6 important?

Yes, students must practice every exercise of the chapter along with the solved questions given in the NCERT book. This will help them understand what kind of questions can be asked in the examination since CBSE papers are all based on NCERT textbooks. 

3. Can askIITians provide more study material for lines and angles?

Yes, we have an array of resources when it comes to learning and practising Maths concepts. These include revision notes, worksheets, daily practice papers, sample papers, important questions, extra questions and much more. Enrol in our online coaching classes today, study in live classes and access unlimited study resources.