Grade 8–10
Pythagorean Theorem
The Pythagorean theorem explained: formula a² + b² = c², two proofs you can watch, the converse, Pythagorean triples and 10 worked examples. Drag the triangle yourself.
Grade 10–11
Trigonometric Ratios and the Unit Circle
Drag a point round the unit circle and watch sin, cos and tan change. Standard angle table, ASTC signs, identities, radians and graphs, with solved examples.
Grade 9–11
Quadratic functions and their graphs
Drag the vertex and change a, b, c to see how a quadratic function graph moves. Learn factoring, completing the square, the quadratic formula and discriminant.
Grade 9–10
Circle theorems
All the circle theorems with drag-and-check diagrams: angle at the centre, same segment, semicircle, cyclic quadrilateral, chords, tangents and alternate segment.
Grade 9–10
Heights and distances: elevation and depression angles
What angle of elevation and angle of depression mean, how the height-and-distance formula works, and how two observations solve a tower's height without ever measuring it — with an interactive simulation and solved problems.
Grade 9–11
Probability: experimental vs theoretical probability
What probability means, how the sample-space formula P(E) = n(E)/n(S) works, and why experimental frequency edges closer to theoretical probability the more you flip, roll or draw — with a coin, dice and coloured-ball simulator.
Grade 10–11
Arithmetic and Geometric Sequences
Learn the arithmetic and geometric sequence formulas for the nth term and sum, Gauss's pairing trick, and the sum-to-infinity formula a/(1−r), with a drag-and-slide bar-chart simulation and worked examples.
Grade 9–10
Mean, Median and Mode
Learn the mean, median and mode formulas, why the median resists an outlier while the mean does not, and the grouped-data median/mode formulas, by dragging points on a number line, with worked examples.
Keep studying this topic
The animation made the idea click; now turn it into marks. Syllabus, suggestions, textbooks and admission-test guides are below.
SSC
SSC Mathematics: syllabus and preparation
SSC
SSC Higher Mathematics: syllabus and preparation
HSC
HSC Higher Mathematics: syllabus and preparation
Textbook
Class 9-10 Mathematics textbook
Textbook
Class 9-10 Higher Mathematics textbook
Admission
Engineering admission test preparation
Admission
Jahangirnagar University mathematical and physical sciences unit
English
Paragraph: Artificial Intelligence
Bangla
রচনা: কৃত্রিম বুদ্ধিমত্তা (in Bangla)
SSC
SSC suggestions
HSC
HSC suggestions
Admission
University admission guide
SSC
SSC syllabus
HSC
HSC syllabus
Animations in other subjects
Physics
Refraction of light
Physics
Ohm's law
Physics
Projectile motion
Physics
Simple pendulum
Physics
Electric field
Physics
Wave interference
Physics
Free Fall
Physics
Lens ray diagrams
Physics
Newton's Laws of Motion
Physics
Spherical mirror ray diagrams
Physics
Electromagnetic Induction
Physics
Conservation of Momentum and Collisions
Physics
Work, Energy and Power
Physics
Inclined Plane
Chemistry
Structure of the atom
Chemistry
Acids, Bases and the pH Scale
Chemistry
Electron configuration
Chemistry
Gas laws: Boyle, Charles, Gay-Lussac, Avogadro and PV = nRT
Chemistry
How an Ionic Bond Forms
Chemistry
Electrolysis and Faraday’s Laws
Chemistry
Covalent Bond
Chemistry
Periodic Trends
Biology
Mitosis cell division
Biology
Diffusion and Osmosis
Biology
Photosynthesis
Biology
The human heart: structure and function
Biology
Mendelian Genetics
Biology
DNA Replication
Biology
Cellular Respiration
Biology
Enzyme Action
Biology
The Nerve Impulse and the Action Potential
Biology
The Nephron and Urine Formation
Biology
Meiosis Cell Division
Biology