Read and download the Chapter 7 Triangles 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 7 Triangles Digital Edition
For Class 9 Mathematics, this chapter in NCERT Book Class 9 Maths Triangles 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 7 Triangles NCERT Book Class Class 9 PDF (2025-26)
Triangles and their parts, Congruence of triangles, Congruence and correspondence of vertices, Criteria for Congruence of triangles: (i) SAS (ii) ASA (iii) SSS (iv) RHS AAS criterion for congruence of triangles as a particular case of ASA criterion.
• Angles opposite to equal sides of a triangle are equal,
• Sides opposite to equal angles of a triangle are equal,
• A point equidistant from two given points lies on the perpendicular bisector of the line-segment joining the two points and its converse,
• A point equidistant from two intersecting lines lies on the bisectors of the angles formed by the two lines,
• In a triangle
(i) side opposite to the greater angle is longer
(ii) angle opposite the longer side is greater
(iii) the sum of any two sides is greater than the third side.
(B) Multiple Choice Questions
Write the correct answer :
Sample Question 1 : If Δ ABC ≅ Δ PQR and Δ ABC is not congruent to Δ RPQ, then which of the following is not true:
(A) BC = PQ (B) AC = PR (C) QR = BC (D) AB = PQ
Solution : Answer (A)
Please refer to attached file for NCERT Class 9 Maths Triangles 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 7 Triangles
Download the official NCERT Textbook for Class 9 Mathematics Chapter 7 Triangles, 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 7 Triangles 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 7 Triangles, 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 7 Triangles 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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