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Recreational Mathematics
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Demonstrations 81  100 of 961
Circle Illusion
Orthogonal Projection of a Solid of Constant Width
The Ellipse Problem of Steinhaus
Infinite Magic Elliptic Curves
RootFinding Fractals
Plotting Collatz Sequences
80 Golden Rhombohedra
Symmetries of a Prism
Proposition 30, Book XI, Euclid's Elements
Proposition 29, Book XI, Euclid's Elements
Kaleidocycles
Inverting the Rhombic Dodecahedron
Cubic Symmetry Types
SixPiece Dissection of a Tetrahedron into Its Mirror Image
Escher's Method Applied to Created Celtic Designs
Irregular Tilings
Rubik's Snake Puzzle
Ant Puzzle
Other Formulations of the Collatz Problem
Envelope Paradox
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