Mathematics Class 9th
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Chapter-1 NUMBER SYSTEMS
Number Systems forms the cornerstone of Class 9 Mathematics, expanding students' understanding from familiar rational numbers to the complete real number system. This chapter systematically reviews natural numbers, whole numbers, integers, and rationals while introducing irrational numbers through geometric proofs and algebraic demonstrations.
Key concepts covered include proving irrationality, decimal expansions of rational numbers (terminating vs. non-terminating repeating), the Fundamental Theorem of Arithmetic, operations with surds, and rationalizing denominators—skills essential for board exams and higher mathematics. Students learn to represent real numbers on the number line and solve proof-based questions that test logical reasoning.
This online course module delivers these concepts through engaging video lessons, step-by-step solved examples, NCERT exercise solutions, and board-style practice questions. Perfect for CBSE and RBSE exam preparation, Number Systems builds the strong foundation needed for algebra, geometry, and coordinate geometry in subsequent chapters.
Chapter – 2 POLYNOMIALS
Chapter-3 COORDINATE GEOMETRY
Chapter-4 LINEAR EQUATIONS IN TWO VARIABLES
Chapter-5 INTRODUCTION TO EUCLID’S GEOMETRY
Chapter-6 LINES AND ANGLES
Chapter-7 TRIANGLES
Chapter-8 QUADRILATERALS
Chapter-9 CIRCLES
Chapter-10 HERON’S FORMULA
Chapter-11 SURFACE AREAS AND VOLUMES
Chapter-12 STATISTICS