Grade 9 Math Video Tutorials
Master every concept with our comprehensive video lessons
Number Systems
Review of representation of natural numbers, integers, rational numbers on the number line
Learn how to represent different types of numbers on the number line with proper scale and precision.
Watch Video TutorialRational numbers as recurring/terminating decimals
Understand how rational numbers can be expressed as decimals that either terminate or repeat.
Watch Video TutorialOperations on real numbers
Master addition, subtraction, multiplication and division of real numbers with examples.
Watch Video TutorialExamples of non-recurring/non-terminating decimals
Explore decimals that neither terminate nor repeat and understand their significance.
Watch Video TutorialExistence of non-rational numbers (irrational numbers) such as √2, √3, and their representation on the number line
Discover irrational numbers and learn techniques to represent them on the number line.
Watch Video TutorialRationalization (with precise meaning) of real numbers
Learn the process of rationalization to eliminate radicals from denominators.
Watch Video TutorialLaws of exponents for real numbers
Understand and apply the fundamental laws governing exponents with real numbers.
Watch Video TutorialPolynomials
Definition of polynomial in one variable
Learn what constitutes a polynomial and understand its basic structure.
Watch Video TutorialCoefficients, terms and degree of a polynomial
Identify and understand the components that make up a polynomial expression.
Watch Video TutorialTypes of polynomials (zero, linear, quadratic, cubic)
Classify polynomials based on their degree and understand their characteristics.
Watch Video TutorialMonomials, binomials, trinomials
Learn to categorize polynomials based on the number of terms they contain.
Watch Video TutorialAddition, subtraction and multiplication of polynomials
Master the fundamental operations with polynomial expressions.
Watch Video TutorialDivision algorithm for polynomials (restricted to polynomials with linear divisor)
Understand how to divide polynomials using the division algorithm method.
Watch Video TutorialCoordinate Geometry
The Cartesian plane
Understand the coordinate system and the two-dimensional plane.
Watch Video TutorialCoordinates of a point
Learn how to read and write coordinates to locate points on the plane.
Watch Video TutorialNames and signs of the quadrants
Identify the four quadrants and understand the sign conventions in each.
Watch Video TutorialPlotting points in the plane
Practice marking points on the Cartesian plane using their coordinates.
Watch Video TutorialLinear Equations in Two Variables
Linear equations in two variables
Understand the standard form and properties of linear equations with two variables.
Watch Video TutorialGraph of a linear equation
Learn to plot linear equations and interpret their graphical representations.
Watch Video TutorialExamples and problems from real life, including age and number problems
Apply linear equations to solve practical problems from everyday situations.
Watch Video TutorialIntroduction to Euclid’s Geometry
Euclid’s approach to geometry
Explore the historical development and fundamental concepts of Euclidean geometry.
Watch Video TutorialDefinitions, axioms, and postulates
Understand the building blocks of geometric reasoning and proof.
Watch Video TutorialEquivalent versions of Euclid’s fifth postulate
Examine the parallel postulate and its significance in geometry.
Watch Video TutorialLines and Angles
Intersecting and non-intersecting lines
Learn about different types of lines and their relationships in space.
Watch Video TutorialPairs of angles: complementary, supplementary, adjacent, linear pair, vertically opposite angles
Identify and classify different angle pairs and understand their properties.
Watch Video TutorialProperties of angles when two lines intersect or when a transversal crosses two lines
Discover the angle relationships formed by intersecting lines and transversals.
Watch Video TutorialLines parallel to the same line are parallel to each other
Understand the transitive property of parallel lines and its applications.
Watch Video TutorialAngle sum property of a triangle
Prove and apply the fundamental property that the angles of a triangle sum to 180°.
Watch Video TutorialTriangles
Congruence of triangles
Understand what it means for two triangles to be congruent and how to prove it.
Watch Video TutorialCriteria for congruence: SSS, SAS, ASA, RHS
Learn the different conditions under which triangles are congruent.
Watch Video TutorialProperties of a triangle—inequalities, angles, and sides
Explore the relationships between angles and sides in any triangle.
Watch Video TutorialTriangle inequality theorem
Understand why the sum of any two sides of a triangle must be greater than the third side.
Watch Video TutorialInequality relations between sides and angles
Learn how side lengths relate to opposite angle measures in a triangle.
Watch Video TutorialQuadrilaterals
Angle sum property of quadrilateral
Discover why the interior angles of any quadrilateral sum to 360°.
Watch Video TutorialTypes of quadrilaterals and their properties
Learn about parallelograms, rectangles, squares, rhombuses, trapezoids and kites.
Watch Video TutorialMid-point theorem
Understand and apply the theorem about the segment joining midpoints of two sides of a triangle.
Watch Video TutorialAreas of Parallelograms and Triangles
Meaning of area
Understand the concept of area as a measure of two-dimensional space.
Watch Video TutorialArea of a triangle using base and height
Learn and apply the fundamental formula for calculating triangle areas.
Watch Video TutorialArea of parallelograms
Discover how to calculate the area of parallelograms using base and height.
Watch Video TutorialRelationship between the areas of a triangle and parallelogram with the same base and between the same parallels
Explore the interesting relationship between these two areas under specific conditions.
Watch Video TutorialCircles
Definitions related to circles: chord, arc, diameter, radius, secant, sector, segment
Learn the terminology and basic elements of circle geometry.
Watch Video TutorialAngle subtended by a chord at a point
Understand how chords create angles at various points on the circle.
Watch Video TutorialPerpendicular from the center to the chord
Discover properties of the perpendicular drawn from the center to a chord.
Watch Video TutorialCircle through three points
Learn how to construct and understand the uniqueness of a circle passing through three non-collinear points.
Watch Video TutorialEqual chords and their distances from the center
Explore the relationship between chord length and its distance from the center.
Watch Video TutorialCyclic quadrilaterals
Understand the properties of quadrilaterals that can be inscribed in a circle.
Watch Video TutorialConstructions
Basic constructions using a ruler and compass
Master fundamental geometric constructions with minimal tools.
Watch Video TutorialConstruction of bisectors of line segments and angles
Learn to accurately bisect lines and angles using geometric construction techniques.
Watch Video TutorialConstruction of triangles using ASA, SSS, SAS criteria
Construct triangles when given specific measurements and conditions.
Watch Video TutorialHeron’s Formula
Heron’s formula for finding the area of a triangle
Learn to calculate triangle area using just the lengths of its three sides.
Watch Video TutorialApplication of Heron’s formula in real-life contexts
See how this ancient formula solves practical area measurement problems.
Watch Video TutorialSurface Areas and Volumes
Surface areas and volumes of cubes, cuboids, spheres, hemispheres, right circular cylinders/cones
Learn the formulas and methods to calculate surface area and volume for common 3D shapes.
Watch Video TutorialConversion of units
Master the skill of converting between different units of measurement for length, area and volume.
Watch Video TutorialStatistics
Collection and presentation of data (tabular form)
Learn methods for gathering data and organizing it effectively in tables.
Watch Video TutorialGraphical representation: bar graphs, histograms (with uniform width), and frequency polygons
Understand different ways to visualize data for better interpretation and analysis.
Watch Video TutorialMeasures of central tendency: mean, median, mode (of ungrouped data)
Calculate and interpret the three fundamental statistical measures that represent the center of a data set.
Watch Video TutorialProbability
History, scope and meaning of probability
Explore the origins and fundamental concepts of probability theory.
Watch Video TutorialExperimental (empirical) probability
Understand probability through actual experiments and observed frequencies.
Watch Video TutorialSimple problems based on single events
Solve basic probability questions involving single occurrences.
Watch Video Tutorial