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Course Content
Chapter 1 – Number System
Welcome to Chapter 1 Number System at AnnA Classes. This chapter is the foundation of Class 9 Maths and one of the most important chapters for your CBSE board exam. We have broken this chapter into 10 carefully structured lessons so that you learn every concept step by step — from the basics of number types all the way to laws of exponents, rationalisation and full exam practice. Here is everything you will learn in this chapter: This course covers all 12 chapters of the NCERT Class 9 Maths syllabus with structured, easy-to-understand study material designed for every type of learner whether you are just starting out or preparing for your board exams. What you will get in this course: - Chapter-wise Concept Notes and Theory - Solved Examples with step-by-step explanation - Practice MCQs (Easy, Medium and Hard) - Assertion-Reason Questions - Short and Long Answer Questions - Formula Sheets for quick revision - Mind Maps for visual learners - CBSE Previous Year Questions (2017–2024) - Chapter Test and Mock Papers This course strictly follows the NCERT textbook and CBSE exam pattern. All content is aligned with the latest CBSE 2025-26 syllabus. Whether you want to score full marks in your school exams or build a strong foundation for competitive exams like JEE and NTSE — this course has everything you need. Start learning today with AnnA Classes.
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Number System
Chapter 2 – Polynomials
Covers definition and types of polynomials monomials, binomials, trinomials. Learn zeros of a polynomial, remainder theorem, factor theorem, and algebraic identities. Includes factorization methods and practice questions with full solutions.
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Chapter-2-Polynomials
Chapter 3 – Coordinate Geometry
Covers the Cartesian plane, axes, quadrants, and plotting points. Learn how to locate a point using coordinates, understand the concept of abscissa and ordinate, and represent real-life data graphically. Includes practice questions with full solutions
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Chapter-3-Coordinate_Geometry
Chapter-4-Linear Equations_in Two_Variables
Covers linear equations in two variables (ax + by + c = 0), finding solutions, and graphing them on a Cartesian plane. Learn about infinite solutions, equations parallel to axes, and real-life applications of linear equations. Includes practice questions with full solutions.
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Chapter-4-Linear_Equations_in_Two_Variables
Chapter 5 – Introduction to Euclid’s Geometry
Covers Euclid's definitions, axioms, and postulates. Learn the foundation of geometry, the concept of a point, line, and plane, and how Euclid's five postulates form the basis of modern geometry. Includes practice questions with full solutions.
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Chapter 5 – Introduction to Euclid’s Geometry
Chapter 6 – Lines and Angles
Covers basic terms of geometry, types of angles, intersecting and parallel lines, and related theorems. Learn angle sum property, vertically opposite angles, and transversal properties.
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Chapter 6 – Lines and Angle
Chapter 7 – Triangles
Covers congruence of triangles, congruence rules (SSS, SAS, ASA, RHS), properties of isosceles triangles, and inequalities in triangles. Includes theorem-based and practice questions with full solutions.
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Chapter 7 – Triangles
Chapter 8 – Quadrilaterals
Covers types of quadrilaterals, angle sum property, properties of parallelograms, and the mid-point theorem. Learn how to prove and apply quadrilateral properties. Includes practice questions with full solutions.
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Chapter 8 – Quadrilaterals
Chapter 9 – Areas of Parallelograms and Triangles
Covers the concept of area, figures on the same base and between the same parallels, and area theorems for parallelograms and triangles. Includes practice questions with full solutions.
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Chapter 9 – Areas of Parallelograms and Triangles
Chapter 10 – Circles
Covers definition of a circle, chords, arcs, subtended angles, and theorems related to circles. Learn properties of equal chords, cyclic quadrilaterals, and angle subtended at centre vs circumference. Includes practice questions with full solutions.
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Chapter 10 – Circles
Chapter 11 – Constructions
Covers geometric constructions using compass and ruler — bisecting angles, drawing perpendicular bisectors, and constructing triangles under given conditions. Includes step-by-step solved constructions.
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Chapter 11 – Constructions
Chapter 12 – Heron’s Formula
Our guide on Heron's Formula Class 9 questions and answers makes it super simple. These Class 9 Maths Chapter 12 NCERT solutions explain this cool formula step by step.
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Chapter 12 – Heron’s Formula
Chapter 13 – Surface Areas and Volumes
Covers surface area and volume of cuboids, cubes, cylinders, cones, spheres, and hemispheres. Includes real-life application problems and practice questions with full solutions
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Chapter 13 – Surface Areas and Volume
Chapter 14 – Statistics
Covers collection, presentation and interpretation of data — bar graphs, histograms, frequency polygons, and measures of central tendency (mean, median, mode). Includes practice questions with full solutions.
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Chapter 14 – Statistics
Chapter 15 – Probability
Covers basic concept of probability, experimental vs theoretical probability, and simple probability problems. Learn how to calculate the likelihood of events with real-life examples. Includes practice questions with full solutions.
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Chapter 15 – Probability
Class 9 Maths Complete Course | NCERT | CBSE 2026-27 | AnnA Classes

Welcome to Chapter 1 Number System at AnnA Classes. This chapter is the foundation of Class 9 Maths and one of the most important chapters for your CBSE board exam. We have broken this chapter into 10 carefully structured lessons so that you learn every concept step by step — from the basics of number types all the way to laws of exponents, rationalisation and full exam practice. Here is everything you will learn in this chapter:

S.NO Lesson Title What it Covers About
Lesson 1 Introduction to Number System Types of numbers — N, W, Z, Q, Q’, R and number line Students will understand the complete number family, how each set relates to the other and where every number sits on the number line. Foundation lesson for the entire chapter.
Lesson 2 Rational Numbers Definition, p/q form, decimal expansion, recurring decimals Students will learn what makes a number rational, how to convert recurring decimals to fractions and identify terminating vs non-terminating decimals.
Lesson 3 Irrational Numbers Definition, proof that √2 is irrational, examples Students will understand what irrational numbers are, learn the classic NCERT proof that √2 is irrational and identify irrational numbers confidently.
Lesson 4 Real Numbers and Number Line Representing √2, √3, √5 on the number line Students will learn the geometric method to locate irrational numbers on the number line using compass and ruler — a frequently asked CBSE topic.
Lesson 5 Operations on Real Numbers Adding, subtracting, multiplying surds Students will apply rules of surds — like surds, unlike surds, product rule and simplification of surd expressions with full examples.
Lesson 6 Rationalisation Conjugate method, step-by-step examples Students will learn to eliminate surds from the denominator using the rationalising factor and conjugate method — directly asked in board exams.
Lesson 7 Laws of Exponents All 7 laws with solved examples Students will master all laws of exponents including fractional and negative exponents with board-level solved problems.
Lesson 8 Solved Examples Board-level mixed problems fully solved Students will go through 15 fully worked examples covering all concepts of the chapter  ideal for exam preparation and self-assessment.
Lesson 9 Formula Sheet and Mind Map Quick revision, download ready Students get a one-page formula sheet and a visual mind map covering the entire chapter  perfect for last minute revision before exams.
Lesson 10 Practice Questions and Chapter Test MCQs, A/R, Short/Long, PYQ, Mock Test Students get 50 MCQs, 20 Assertion-Reason questions, short and long answer questions, CBSE PYQs from 2017–2024 and a full 30-mark chapter test.

 

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