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Eric W. Weisstein
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Demonstrations 21  40 of 47
Irreducible Gaussian Fractions
Point in Triangle
BaumSweet Sequence
Onion Polyhedra
The Perfect Venn Diagram
Adding Polygonal Numbers
Pythagoras Tree
Boolean Algebra
Witch of Agnesi
Buffon's Needle Problem
Poincaré Hyperbolic Disk
Spieker Center Triangle Construction
Tautochrone Problem
Equations for Valentines
Clean Tile Problem
Chaos Game
Two Trains Puzzle
Colored Klein Bottle
Polygonal Numbers
Gauss's Circle Problem
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