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George Beck
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Demonstrations 21  40 of 132
Dandelin Spheres for an Ellipse
Reflecting a Regular Polygon across Its Sides in the Hyperbolic Plane
How to Avoid a Collision
Rubik's Cube Mechanism
Graphs from ZeroOne Matrices
Among Six People, Either Three Know Each Other or Three Are Strangers to Each Other
Simple Inequalities in the Unit Cube
Sine, Cosine, and Tangent Using Ratios of Sides of a RightAngled Triangle
Graphing Continued Fractions of Quadratic Irrationals
Grating 3D
Color Mixing
Cone of Pythagorean Triplets
Quadrilateral Tiling with Textures
Plane Cubic Curves
Chains of Regular Polygons and Polyhedra
The Fractal Nature of Partitions
Proving Euler's Polyhedral Formula by Deleting Edges
LittlewoodOfford Problem
Generating Permutations by a Sequence of Transpositions
Adding and Subtracting Positive and Negative Integers
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