Class IX Mathematics
Mathematics
Number systems, polynomials, geometry, Heron's formula, statistics & probability.
1
Chapter 1: Number Systems
Mathematics
rational and irrational numbersreal number linedecimal expansionsoperations on real numberslaws of exponents for real numbers
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2
Chapter 2: Polynomials
Mathematics
polynomials in one variablezeros of a polynomialremainder theoremfactor theoremalgebraic identitiesfactorisation
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3
Chapter 3: Coordinate Geometry
Mathematics
Cartesian planeaxes and quadrantsordered pairsplotting pointsabscissa and ordinate
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4
Chapter 4: Linear Equations in Two Variables
Mathematics
linear equation in two variablessolutions of a linear equationgraphing a linelines parallel to axesreal-world linear models
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5
Chapter 5: Introduction to Euclid's Geometry
Mathematics
Euclid's definitionsaxioms and postulatesfive postulatesdeductive proofparallel postulate
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6
Chapter 6: Lines and Angles
Mathematics
linear pairvertically opposite anglesparallel linestransversalangle sum of a triangle
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7
Chapter 7: Triangles
Mathematics
congruenceSSS, SAS, ASA, AAS, RHS rulesisosceles triangleinequalities in a triangle
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8
Chapter 8: Quadrilaterals
Mathematics
angle sum of quadrilateralparallelogramrectangle, rhombus, squaremidpoint theoremconditions for parallelogram
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9
Chapter 9: Circles
Mathematics
chordperpendicular from centreangle subtended at centreangle in a semicirclecyclic quadrilateral
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10
Chapter 10: Heron's Formula
Mathematics
area of triangle by half base times heightHeron's formulasemi-perimeterarea of quadrilateral by triangulationarea applications
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11
Chapter 11: Surface Areas and Volumes
Mathematics
cuboid and cuberight circular cylinderright circular conesphere and hemisphere
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12
Chapter 12: Statistics
Mathematics
collection of datafrequency distributiongraphical representationmean median mode
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