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Get NCERT solutions for Class 9 Maths free with videos of each and every exercise question and examples. All answers are solved step by step with videos of every question.

**Chapter 1 Number systems**- What are Rational, Irrational, Real numbers, Law of Exponents, Expressing numbers in p/q form, Finding rational number between two numbers , Number line**Chapter 2 Polynomials**- Degrees, zeroes of polynomial, Remainder Theorem, Factorization - Splitting middle term, Factor Theorem, Algebraic Identity**Chapter 3 Coordinate Geometry**- Cartesian System, Abscissa Ordinate, Quadrant, Plotting points (x,y)**Chapter 4 Linear Equations in Two Variables**- Solution - Unique, Infinitely Many , Graph of linear equation in two variables, Forming equations, Equation of lines parallel to x-axis, y-axis**Chapter 5 Introduction to Euclid's Geometry**- Euclid's Definitions, Axioms , Postulates, Equivalent versions of Euclid's Fifth Postulate**Chapter 6 Lines and Angles**- Complementary Angles, Supplementary Angles, Adjacent Angles, Vertically Opposite Angles, Linear pair, Alternate interior angles, interior angles on same side of transversal is supplementary, Sum of angles of a triangle is 180, Exterior Angle is sum of interior opposite angle, Theorems.**Chapter 7 Triangles**- Criteria of Congruence of Triangles - ASA, AAS, SSS, RHS, Angle opposite to equal sides of isosceles triangle are equal, Side opposite to greater angle is longer, Angle opposite to greater side is larger, Theorems**Chapter 8 Quadrilaterals**- Angle sum property of quadrilateral, Properties of Paralleogram, Theorems, Conditions for quadrilateral to be a parallelogram, Mid-point theorem**Chapter 9 Areas of parallelograms and****triangles**- Figures on the same base and between the same parallels,**Chapter 10 Circles**- Terms - Chord, arc, Sector, Segment, Angle subtended by chord at a point, perpendicular from centre to the chord, circle throught 3 points, equal chords and their distances from centre, angle subtended by an arc of the circle.**Chapter 11 Constructions**- We learn how to draw a bisector of an angle, how to draw a perpendicular bisector of a line (with justification), and then we learn how to draw angles using compass like 60, 45, 90. We also study how to do construct a triangle when perimeter and 2 base angles are given; sum of sides, base, and angle is given; difference of sides, base and angle is given**Chapter 12 Heron's Formula**- Area of triangle by herons formula, Finding area of quadrilateral by heros formula**Chapter 13 Surface Areas and Volumes**- Curved , total surface area, volume of cuboid, cube, cylinder, right circular cone, sphere, hemisphere**Chapter 14 Statistics**- Primary, Secondary data, raw, ungrouped, grouped frequency distribution table, Graphical Representation - Bar graph, Histogram, Frequency Polygon, Mean, median, mode.**Chapter 15 Probability**- Experiment, Probability lies between 0 & 1, Empirical (Experimental) Probability of event is number of trials where E has happened by total number of trials.

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