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Mathigon Development Server
Introduction to Probability
Introduction
Computing Probabilities
Probability Trees
Venn Diagrams
Chaos Theory
Introduction
Mathematical Billiard
The Three Body Problem
Phase Space and Strange Attractors
The Logistic Map
Circles and Pi
Introduction
Degrees and Radians
Tangents, Chords and Arcs
The Circle Theorems
Cyclic Polygons
Spheres, Cones and Cylinders
Conic Sections
Codes and Ciphers
Introduction
Binary Numbers
Error Detection
Secret Codes
The Enigma
Public Key Cryptography
Combinatorics
Factorials
Permutations
Combinations
Complex Numbers
Introduction
Complex Arithmetic
Euler’s Formula
Solving Polynomials
De Moivre’s Theorem and Roots of Unity
Data and Statistics
Introduction
Center and Spread
Visualising Data
Sampling
Scatter Plots and Linear Models
Divisibility and Primes
Factors and Multiples
Divisibility Rules
Prime Numbers
The Distribution of Primes
Lowest Common Multiples
Greatest Common Factors
Euclidean Geometry
Introduction
Euclid’s Axioms
Ruler and Compass Construction
Even More Constructions
Angles and Proofs
Origami and Paper Folding
Exploding Dots
Staircase to Infinity
Unusual Numbers
P-adic Numbers
Exponential Functions
Carbon Dating
Exponential Growth and Decay
Comparing Models
Compound Interest
Population Dynamics
Fractals
Introduction
The Sierpinski Triangle
The Mandelbrot Set
Space Filling Curves
Functions
Relations and Functions
Graphing and Interpreting Functions
Piecewise Functions
Absolute Value Functions
Inverse Functions
Rates of Change
Game Theory
The Prisoners’ Dilemma
Cards, Coins and Dice
The Winning Move
Random Walks
Graphs and Networks
Introduction
The Bridges of Königsberg
Handshakes and Dating
Planar Graphs
Map Colouring
The Travelling Salesman Problem
Scheduling Problems
Graphs in Everyday Life
Linear Functions
Input, Output and Graphs
Slope and Intercept
Parallel and Perpendicular Lines
Systems of Equations
Logic, Sets and Proof
Logic and Paradoxes
Axioms and Proof
Proof by Induction
Infinity and Hilbert’s Hotel
Matrices
Transformations
Matrix Arithmetic
Determinants
Matrix Inverses
Cramer’s Rule and Gaussian Elimination
Eigenvalues and Eigenvectors
Non-Euclidean Geometry
Spherical Geometry
Map Projections
Hyperbolic Geometry
Metric Spaces
Topology
Higher Dimensions
2D Shapes and Perimeter
Introduction
Attributes of 2D Shapes
Using Attributes of 2D Shapes to Find Perimeter
Relating Perimeter and Area
Angles and Polygons
Angles
Angles in Polygons
Drawing Triangles
Pythagoras’ Theorem
The Coordinate Plane
Transformations and Congruence
Polygons and Polyhedra
Polygons
Quadrilaterals
Tessellations
Polyhedra
Nets and Cross Sections
Platonic Solids
Probability
Introduction
Probability Trees and Venn Diagrams
Conditional Probability
The Monty Hall Problem
The Birthday Problem
True Randomness
Quadratic Equations
Introduction
Binomial Expressions
Solving Quadratic Equations
The Quadratic Formula
Graphing Quadratics
Projectile Motion
More Applications
Sequences and Patterns
Introduction
Arithmetic and Geometric Sequences
Figurate Numbers
Sequences as Functions
Fibonacci Numbers
Special Sequences
Pascal’s Triangle
Limits and Convergence
Area and Shapes
Introduction
Parallelograms
Triangles
Polygons
Circles and Circumferences
Area of Circles
3D Solids
Introduction
Nets and Surface Area
Prisms and Pyramids
Cylinders and Cones
Spheres
Statistics and Data
Casino Mathematics
Data Visualisation
Center and Spread of Data
Sampling and Estimation
The Wisdom of Crowds
Linear Models
Talks and Workshops
MoMath Workshop
NCTM 2021
Alex Kontorovich
Transformations and Symmetry
Introduction
Rigid Transformations
Congruence
Symmetry
Symmetry Groups and Wallpapers
Symmetry in Physics
Dilations
Similarity
Triangles and Trigonometry
Introduction
Properties of Triangles
Midsegments and Similarity
Triangle Congruence
Pythagoras’ Theorem
Isosceles and Equilateral Triangles
Trigonometry
Sine and Cosine Rules
Vectors
Introduction
Vector Arithmetic
Scalar Products and Equations of Planes
Cross Products and Equations of Lines
Geometry Problems