Read and download the Chapter 6 Lines and Angles PDF from the official NCERT Book for Class 9 Mathematics. Updated for the 2025-26 academic session, you can access the complete Mathematics textbook in PDF format for free.
NCERT Class 9 Mathematics Chapter 6 Lines and Angles Digital Edition
For Class 9 Mathematics, this chapter in NCERT Book Class 9 Maths Lines And Angles Questions provides a detailed overview of important concepts. We highly recommend using this text alongside the NCERT Solutions for Class 9 Mathematics to learn the exercise questions provided at the end of the chapter.
Chapter 6 Lines and Angles NCERT Book Class Class 9 PDF (2025-26)
(A) Main Concepts and Results
Complementary angles, Supplementary angles, Adjacent angles, Linear pair, Vertically opposite angles.
• If a ray stands on a line, then the adjacent angles so formed are supplementary and its converse,
• If two lines intersect, then vertically opposite angles are equal,
• If a transversal intersects two parallel lines, then
(i) corresponding angles are equal and conversely,
(ii) alternate interior angles are equal and conversely,
(iii) interior angles on the same side of the transversal are supplementary and conversely,
• Lines parallel to the same line are parallel to each other,
• Sum of the angles of a triangle is 180°,
• An exterior angle of a triangle is equal to the sum of the corresponding two interior opposite angles.
(B) Multiple Choice Questions
Write the correct answer:
Sample Question 1 : If two interior angles on the same side of a transversal intersecting two parallel lines are in the ratio 2 : 3, then the greater of the two angles is
(A) 54° (B) 108° (C) 120° (D) 136°
Please refer to attached file for NCERT Class 9 Maths Lines And Angles Questions
| NCERT Book Class 9 Maths Number Systems |
| NCERT Book Class 9 Maths Number Systems Questions |
| NCERT Book Class 9 Maths Polynomials |
| NCERT Book Class 9 Maths Polynomials Questions |
| NCERT Book Class 9 Maths Coordinate Geometry |
| NCERT Book Class 9 Maths Coordinate Geometry Questions |
| NCERT Book Class 9 Maths Linear Equations In Two Variables |
| NCERT Book Class 9 Maths Linear Equations In Two Variables Questions |
| NCERT Book Class 9 Maths Introduction To Euclids Geometry |
| NCERT Book Class 9 Maths Introduction To Euclids Geometry Questions |
| NCERT Book Class 9 Maths Lines And Angles |
| NCERT Book Class 9 Maths Lines And Angles Questions |
| NCERT Book Class 9 Maths Triangles |
| NCERT Book Class 9 Maths Triangles Questions |
| NCERT Book Class 9 Maths Quadrilaterals |
| NCERT Book Class 9 Maths Quadrilaterals Questions |
| NCERT Book Class 9 Maths Herons Formula |
| NCERT Book Class 9 Maths Herons Formula Questions |
| NCERT Book Class 9 Maths Surface Areas And Volumes |
| NCERT Book Class 9 Maths Surface Areas And Volumes Questions |
| NCERT Book Class 9 Maths Statistics |
| NCERT Book Class 9 Maths Statistics and Probability Questions |
Important Practice Resources for Class 9 Mathematics
NCERT Book Class 9 Mathematics Chapter 6 Lines and Angles
Download the official NCERT Textbook for Class 9 Mathematics Chapter 6 Lines and Angles, updated for the latest academic session. These e-books are the main textbook used by major education boards across India. All teachers and subject experts recommend the Chapter 6 Lines and Angles NCERT e-textbook because exam papers for Class 9 are strictly based on the syllabus specified in these books. You can download the complete chapter in PDF format from here.
Download Mathematics Class 9 NCERT eBooks in English
We have provided the complete collection of NCERT books in English Medium for all subjects in Class 9. These digital textbooks are very important for students who have English as their medium of studying. Each chapter, including Chapter 6 Lines and Angles, contains detailed explanations and a detailed list of questions at the end of the chapter. Simply click the links above to get your free Mathematics textbook PDF and start studying today.
Benefits of using NCERT Class 9 Textbooks
The Class 9 Mathematics Chapter 6 Lines and Angles book is designed to provide a strong conceptual understanding. Students should also access NCERT Solutions and revision notes on studiestoday.com to enhance their learning experience.
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