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Izidor Hafner
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Demonstrations 81  100 of 841
The Deltoid is a Kakeya Set
Reye's Configuration
Pál Joints
Dissecting a Regular 2ngon into Four Smaller 2ngons
Making Kaleidoscopes
Twisted Antiprism
Square of Opposition in Aristotelian Logic
Op Art on a Sphere and a Cylinder
Extracting a Spherical Sector
Three Calculations of Pi Before 1800
Toroids with Regular Faces
Cylinder and Cone Sectors
Kaleidoscope with One Horizontal and Two Vertical Mirrors
Constructing Op Art
Friezes from Function Graphs
Machin's Computation of Pi
Toroid with 24 Congruent Faces
Parametrized Toroid with 42 Faces
Realization of Heawood's Map on a Toroidal Polyhedron
Polyhedral Blooms that Retain Symmetry
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