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Polyhedra
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Demonstrations 121  140 of 640
Two Proofs that the Volume of the Regular Octahedron Is Four Times the Volume of the Regular Tetrahedron
80 Golden Rhombohedra
Symmetries of a Prism
Proposition 30, Book XI, Euclid's Elements
Proposition 29, Book XI, Euclid's Elements
Kaleidocycles
Intersection of a Convex Polyhedron and a Plane
Inverting the Rhombic Dodecahedron
Expanding Cube
How FivePetal Flowers Grow on a Rhombic Triacontahedron to Become a Rhombic Hexecontahedron
Filling a Regular Icosahedron with Infinitely Many Golden Octahedra
Coloring Polyhedra Given by Map Projections
Framing a Rhombic Dodecahedron with Regular Octahedra
Cubic Symmetry Types
SixPiece Dissection of a Tetrahedron into Its Mirror Image
Snub Tetrahedron
Dehn Invariant of Some Disjoint Unions of Polyhedra with Icosahedral Symmetry
The Volume of the Regular Octahedron Is Four Times the Volume of the Regular Tetrahedron
Filling a Tetrahedron with Infinitely Many Octahedra
Nets for Regular Spherical Models
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