GSEB Class 9
Browse all chapters with detailed explanations, formulas, and study resources
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Number Systems
Rational and irrational numbers, real numbers, and their representation on the number line.
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Polynomials
Algebraic expressions, degree, zeros, factorization, and algebraic identities.
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Coordinate Geometry
Cartesian coordinate system, plotting points, and reading coordinates.
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Linear Equations in Two Variables
Linear equations with two variables, graphing, and solutions.
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Introduction to Euclid Geometry
Euclidean geometry foundations: axioms, postulates, and basic geometric terms.
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Lines and Angles
Properties of lines, angles, and their relationships in geometric figures.
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Triangles
Congruence of triangles, inequalities, and properties of triangles.
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Quadrilaterals
Properties of parallelograms, rectangles, rhombus, squares, and trapeziums.
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Areas of Parallelograms and Triangles
Area formulas for parallelograms, triangles, and figures on the same base.
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Circles
Chord properties, arc theorems, cyclic quadrilaterals, and angle subtended by chords.
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Constructions
Geometric constructions using compass and straightedge: bisectors, perpendiculars, and triangles.
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Heron Formula
Area of triangles using side lengths: Herons formula and its applications.
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Surface Areas and Volumes
Surface area and volume of cubes, cuboids, cylinders, cones, spheres, and hemispheres.
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Statistics
Data collection, presentation (tables, graphs), and measures of central tendency.
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Probability
Empirical probability, experiments, and the likelihood of events.