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Demonstrations 641 - 660 of 872
Two Operations on Rhombic Solids
Gematria (Letter Sums)
Pandigital Olympic Circles Puzzle
Dissection of Two Truncated Octahedra into a Cube
Hanegraaf's Dissection of a Truncated Octahedron into a Hexagonal Prism
Dissection of a Cube into Two Kinds of Triacontahedra
Dissection of Three Bilunabirotundas and a Dodecahedron into Rhombic Solids
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
Six-Piece Dissection of Hill's Tetrahedron of Type 3 into a Triangular Prism
Four-Piece 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
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