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Geometry
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Demonstrations 2381  2400 of 3456
Theorem of the Equal Incircles
Yates's Trisector
Inversive Geometry IV: Inverting a Point with a Compass in Three Steps
Copernicus's Theorem
Rolling Polygons
Folding an Equilateral Triangle in a Square
Generating a Lemniscate II: Rotating Line
Cross Sections of Graphs of Functions of Two Variables
The Malfatti Problem
Enumerating Pythagorean Triangles
Square Passing through Four Points
Problems on Circles X: Tangent Circles Generate Ellipses
Problems on Circles VIII: A Spiral of Circles
Parameters for Plotting a Quartic
The Puzzle of the Two Bridges
The Puzzle of the Bridge
Parameters for Plotting a Cubic Polynomial
Crisscrossing a Polygon
Problems on Circles VII: Circles of a Given Size Tangent to Other Two
Vector Rotations in 3D
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