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Recreational Mathematics
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Demonstrations 721  740 of 960
Two Polyhedra with D2 Symmetry
Dissecting an Octagon into Four Smaller Octagons
Dissecting a Decagon into Two Pentagons and Two Pentagrams
TwoOctagonsintoOne Dissection in Two Steps
Freese's TwoOctagonsintoOne Dissection
Fermat's Magic Cube
Dissection of a Cube into Five Solids
Proposition 3, Book XII, Euclid's Elements
Magic Cube of Order 5
The 26Sided Unilluminable Room
Loculus of Archimedes
Cube Net
Golden Spiral
Letter Products
Bilinski's Vase
Deriving a Bilunabirotunda from Rhombic Solids
Cube Packing
Two Operations on Rhombic Solids
Gematria (Letter Sums)
Pandigital Olympic Circles Puzzle
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