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Geometry
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Demonstrations 2121  2140 of 3146
Lindgren's TwoTrianglestoOne Hinged Dissection
Labeling the Integer Heptagon
Integral Grid Triangles with Consecutive Side Lengths
Inversion of an Array of Cubes
Octahedron Stars
Taylor's Hinged Dissection of One Parallelogram into Another
Macaulay's Triangle and Trapezoid Hinged Dissection
Two Hinged Dissections of a Gnomon to a Square
A Proof of Euler's Formula
Two Hinged Dissections of a Greek Cross to a Square
Equivalence of Three Catalan Number Interpretations
Hinged Dissection of Squares
Folding and Unfolding Polar Zonohedra
The Area of a Triangle Using a Determinant
Hinged Dissection of Four Hexagons into One
Labeled Polygon Triangulations
An Intuitive Proof of the Pythagorean Theorem
Another Triangle into Hexagram Dissection
Spinning Double YinYang
Hinged Dissection of an Equilateral Triangle into Two Hexagons
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