Mastering Class 9 Mathematics is crucial for building a strong foundation in the subject. At CBSEJanta.com, we provide detailed chapter-wise solutions, along with key formulas to simplify your learning process.
CBSE Class 9 Maths Syllabus – Chapter Names & Important Formulas
| Chapter Number | Chapter Name | Key Formulas |
|---|---|---|
| 1 | Number Systems | – Rational Numbers, Irrational Numbers, Real Numbers |
| – Decimal Expansion: Terminating and Non-Terminating | ||
| 2 | Polynomials | – Zeros of a Polynomial |
| – Algebraic Identities: | ||
| (a + b)² = a² + 2ab + b² | ||
| (a – b)² = a² – 2ab + b² | ||
| (a + b)(a – b) = a² – b² | ||
| 3 | Coordinate Geometry | – Distance Formula: d = √[(x₂ – x₁)² + (y₂ – y₁)²] |
| – Section Formula: [(x₁ + kx₂)/(k + 1), (y₁ + ky₂)/(k + 1)] | ||
| 4 | Linear Equations in Two Variables | – General Form: ax + by + c = 0 |
| – Graphical Solution of Linear Equations | ||
| 5 | Introduction to Euclid’s Geometry | – Euclid’s Postulates and Axioms |
| – Basic Definitions of Point, Line, Plane | ||
| 6 | Lines and Angles | – Sum of Angles in a Triangle: 180° |
| – Vertically Opposite Angles Are Equal | ||
| – Linear Pair Axiom: ∠1 + ∠2 = 180° | ||
| 7 | Triangles | – Pythagoras Theorem: a² + b² = c² (In Right-Angled Triangles) |
| – Congruence Criteria (SSS, SAS, ASA, RHS) | ||
| – Area of a Triangle: ½ × base × height | ||
| 8 | Quadrilaterals | – Sum of Interior Angles of a Quadrilateral = 360° |
| – Parallelogram Area: base × height | ||
| 9 | Areas of Parallelograms and Triangles | – Area of Triangle: ½ × base × height |
| – Area of Parallelogram: base × height | ||
| 10 | Circles | – Circumference: 2πr |
| – Area of Circle: πr² | ||
| – Angle Subtended by Arc at Centre = 2 × Angle Subtended at Any Point on the Circle | ||
| 11 | Constructions | – Basic Geometrical Constructions (Bisecting Angles, Drawing Perpendiculars) |
| 12 | Heron’s Formula | – Heron’s Formula: √[s(s – a)(s – b)(s – c)], where s = (a + b + c)/2 |
| 13 | Surface Areas and Volumes | – Surface Area of Cube: 6a² |
| – Surface Area of Sphere: 4πr² | ||
| – Volume of Cylinder: πr²h | ||
| – Volume of Cone: ⅓πr²h | ||
| 14 | Statistics | – Mean = (Σx)/n |
| – Mode = Value with Highest Frequency | ||
| – Median = Middle Value of the Ordered Data | ||
| 15 | Probability | – Probability of an Event: P(E) = (Number of Favorable Outcomes) / (Total Outcomes) |
Why CBSEJanta.com for Class 9 Maths?
- Complete Chapter Solutions: Step-by-step solutions for all chapters in Class 9 Maths.
- Key Formulas for Each Chapter: Easy access to essential formulas to simplify learning.
- Practice Questions: Reinforce concepts with additional exercises and questions.
- Interactive and Engaging Learning: Clear explanations for tough topics.
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