Download the official Circles chapter from the new Ganita Manjari textbook here. This Class 9 Maths Book PDF Chapter 5 Circles is the exact NCERT file for the 2026-27 session. Read it to learn chords, arcs, and cyclic quadrilaterals from the source before your Class 9 annual exam.
- Length: the official chapter PDF runs to 26 pages of text, figures, and exercises.
- What it teaches: parts of a circle, chords, arcs, angles, and cyclic quadrilaterals.
- New book: this is the 2026-27 Ganita Manjari book, so Circles is now Chapter 5.
This is the original NCERT chapter file, matched to the current 2026-27 syllabus, so every page, figure, and exercise number is exactly what your teacher uses in class.
What's in the Class 9 Maths Circles NCERT Book PDF?
The Class 9 Maths Book PDF Chapter 5 Circles is a 26-page chapter. It starts with the parts of a circle and its symmetry, then asks how many circles pass through given points. The file builds the chord theorems, the link between arcs and angles, and the rules for concyclic points and cyclic quadrilaterals. It ends with six exercise sets and an End-of-Chapter set.
Video Chapter Walkthrough
Source: PW Class 9 - NEEV on YouTube
Circles Section-by-Section Overview
The chapter moves from basic parts to full theorems in a clear order. The table below maps each section to what you will learn.
| Section | Topic | What you will learn |
|---|---|---|
| Getting Started with Circles | Parts and symmetry | Naming the centre, radius, chord, and arc, and why a circle is symmetric |
| Circles Through Given Points | The unique circle | Why exactly one circle passes through three non-collinear points |
| Chords and Angles | Equal chords | Equal chords make equal angles at the centre |
| Distance of Chords | Chord length formula | Equal chords are equally far from the centre |
| Angles Subtended by an Arc | Centre and circle angles | The centre angle is double the angle on the circle |
| Cyclic Quadrilaterals | Concyclic points | Opposite angles of a cyclic quadrilateral add to 180 degrees |
Solved Examples and Exercises in Circles
The chapter gives in-text solved examples first, then exercise sets to practise. Read the solved examples before you try each set.
- Exercises 5.1 to 5.6: six sets covering chords, arcs, angles, and cyclic figures.
- End-of-Chapter Exercises: mixed problems that pull the whole chapter together.
- In-text solved examples: step-by-step models placed through the chapter text.
What Changed in the 2026-27 Circles Chapter
This chapter comes from the new Ganita Manjari book, which replaces the old 15-chapter NCERT Maths book. The new book is activity-based, so each circle theorem is shown by folding and drawing before it is proved. The old book placed Circles as a later geometry chapter. Now it sits as Chapter 5, and the theorems are ordered so each one leads into the next.
How to Read the Circles Chapter
Read the Class 9 Maths Book PDF Chapter 5 Circles with a compass and ruler nearby. Skim once to see the flow, then read slowly and draw each figure as the theorem appears. Work through the solved examples, and only then try the exercises. This skim, then detail, then examples, then exercises order makes the proofs clear.
How will Collegedunia Help You with the Circles NCERT Book?
Collegedunia pairs the Class 9 Maths Book PDF Chapter 5 Circles with free study support, so the theorems stay simple.
- Free download: get the official chapter PDF in one click, with no sign-up.
- Matched resources: open the notes, formula sheet, and solutions for the same chapter.
- 2026-27 ready: every linked resource follows the new Ganita Manjari book.
- Exam focus: the support is framed for your Class 9 annual exam and the base for Class 10 geometry.
More Circles Maths Class 9 Resources
Use the box below to open other study resources for the same chapter.
NCERT Book PDF for Class 9 Maths: All Chapters
Use the table below to open the NCERT Book PDF for any other chapter of the new Class 9 Maths book.
| Chapter | Resource |
|---|---|
| Chapter 1 | Coordinates NCERT Book PDF |
| Chapter 2 | Linear Polynomials NCERT Book PDF |
| Chapter 3 | The World of Numbers NCERT Book PDF |
| Chapter 4 | Algebraic Identities NCERT Book PDF |
| Chapter 5 | Circles NCERT Book PDF |
| Chapter 6 | Perimeter and Area NCERT Book PDF |
| Chapter 7 | Introduction to Probability NCERT Book PDF |
| Chapter 8 | Sequences and Progressions NCERT Book PDF |
Circles Class 9 Maths NCERT Book PDF FAQs
Ques. How many pages is the Class 9 Maths Circles NCERT Book PDF?
Ans. The official Chapter 5 Circles file runs to 26 pages. It holds the full text, figures, six exercise sets, and the End-of-Chapter set.
Ques. Is Circles part of the new Ganita Manjari book?
Ans. Yes. Circles is Chapter 5 of the new Ganita Manjari book for the 2026-27 syllabus. In the old NCERT book, Circles appeared as a later geometry chapter.
Ques. Is this the official NCERT chapter PDF?
Ans. Yes. This is the original NCERT chapter file, not a copy, so the pages and exercise numbers match the book your school uses.
Ques. What exercises does Chapter 5 have?
Ans. The chapter has six exercise sets, 5.1 to 5.6, and one End-of-Chapter set, along with in-text solved examples.
Ques. Does this chapter cover cyclic quadrilaterals?
Ans. Yes. The chapter explains concyclic points and proves that opposite angles of a cyclic quadrilateral add to 180 degrees.
Comments