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Izidor Hafner
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Demonstrations 421  440 of 1010
Some Uniform Polyhedra
Nets of Regular Compounds
Polyhedral Compounds
Star Pyramids
Sydler's Dissection of a Hill Tetrahedron into an Isosceles Triangular Prism
Proposition 7, Book XII, Euclid's Elements
Space Filling with a Rhombic Dodecahedron of the Second Kind
Goldberg's Tristable Polyhedron
Distorting Jessen's Orthogonal Icosahedron to an Octahedron
Infinitesimally Flexible Octahedron
Tiling the Octahedron and the Plane with Tiling of a Hexagram
The Four KeplerPoinsot Solids
Kepler's Rhombic Solids
Construct Euclid's Regular Dodecahedron
The Journey of Speke and Grant
Euler's Substitutions for the Integral of a Particular Function
Opposite Coefficients Method for Solving Two Equations in Two Unknowns
Some Unistable Polyhedra
Solving a System of Two Linear Equations with Substitution
Icosahedral Rotational Symmetry Types
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