CBSE Class 9 Sample Papers, Syllabus, Test Papers & NCERT Solutions

Notes For All Chapters Maths Class 9 1. Quadrilateral: A plane figure bounded by four lines segment AB, BC, CD and DA is called a quadrilateral. The sum of the angles of a quadrilateral is 360°. 2. Various Types of Quadrilaterals (i) Parallelogram: A quadrilateral in which opposite sides are parallel is called parallelogram and it is written as […]

Notes For All Chapters Maths Class 9 Linear Equations: Any equation which can be put in the form ax + by + c = 0, where a, b and c are real numbers and a and b are not both zero is called a linear equation in two variables. The solution of a linear equation is […]

Notes For All Chapters Maths Class 9 Class 9 Chapter 10 Notes Heron’s Formula

Notes For All Chapters Maths Class 9 1. Cartesian System: The system used to describe the position of a point in a plane is called the cartesian system. In a cartesian system, there are two perpendicular lines and a point is located by referring them. The horizontal line XX’ is called X-axis and vertical line YY’ is […]

Notes For All Chapters Maths Class 9 1. Triangle: A closed figure formed by three intersecting lines is called a triangle (‘Tri’ means ‘three’). A triangle has three sides, three angles and three vertices. e.g., In triangle ABC, denoted as ∆ABC. AB, BC, CA are the three sides, ∠A, ∠B, ∠C are the three angles and A, […]

Notes For All Chapters Maths Class 9 Class 9 Chapter 6 Notes Lines and Angles

Notes For All Chapters Maths Class 9 1. Axioms or Postulates: Axioms or postulates are the assumptions which are obvious universal truths. They are not proved. Mainly postulates are used for especially geometry and axioms are used for especially algebra. 2. Theorems: Theorems are statements which are proved using ‘ definitions, axioms, previously proved statements and deductive reasoning. 3. Euclid’s […]

Notes For All Chapters Maths Class 9 Class 9 Chapter 2 Notes Polynomials

Notes For All Chapters Maths Class 9 Class 9 Chapter 1 Notes Number Systems

Chapter 1  Number Systems Formulas Chapter 2  Polynomials Formulas Chapter 3  Coordinate Geometry Formulas Chapter 4  Linear Equations in Two Variables Formulas Chapter 5  Introduction to Euclids Geometry Formulas Chapter 6  Lines and Angles Formulas Chapter 7  Triangles Formulas Chapter 8  Quadrilaterals Formulas Chapter 9 Circles Formulas Chapter 10 Heron’s Formula Formulas Chapter 11 Surface […]