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Ed Pegg Jr
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Demonstrations 101  120 of 369
Blood Spatter Trigonometry
Concurrent Diagonals in a 30Gon
Remainder Graphs
Modular Multiplication on a Circle
The Circles of Descartes
AnglePath
Chromatic Spindles
Discrepancy Conjecture
3D UnitDistance Graphs
Interval Visibility Graphs
EarthMoon Problem
Thickness2 Graphs
Two Enumerations of the Rationals
Loeschian Spheres
Halving a Triangle Perimeter
Permutations, Lehmer Code, and Lexicographic Index
Pentagon Tilings
Semigraceful Eulerian Graphs
Some Polyhedra with Identical Triangular Faces
Seven Touching Cylinders Puzzle
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