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Recreational Mathematics
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Demonstrations 681  700 of 901
Proposition 30, Book XI, Euclid's Elements
Proposition 29, Book XI, Euclid's Elements
Proof of Proposition 28, Book XI, Euclid's Elements
Another Dissection of Two Rhombic Solids into an Icosidodecahedron and a Rhombicosidodecahedron
Dissection of the Oblate Golden Rhombohedron
Definitions of Hill's Tetrahedra
SixPiece Dissection of Hill's Tetrahedron of Type 3 into a Triangular Prism
FourPiece Dissection of Hill's Tetrahedron of Type 2 into a Triangular Prism
Dissection of Hill's Tetrahedron of Type 1
Two Proofs of the Equality of the Volumes of a Box and a Parallelepiped
Swirl Points
FiveSquarestoOne Dissection
Dissection of a Truncated Octahedron into Hexagonal Skew Prisms and Parallelepipeds
Dissection of Two Rhombic Solids into an Icosidodecahedron and a RhombIcosiDodecahedron
Dissection of an Oblique into a Right Prism
Taking Apart a Cube
Equidecomposition of a Rhombohedron, Hexagonal Prism, and a Rhombic Dodecahedron
Tiling Space with a SchmittConway Biprism
Dissection of a Rhombohedron into a Right Prism with the Same Base
Nutts Puzzle
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