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Plane Geometry
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Demonstrations 1  20 of 1124
Outer Billiards on Regular Polygons
Updated this week
Possible Counterexamples to the Minimal Squaring Conjecture
New this month
Geometric Solution of a Trigonometric Equation
New this month
Geometric Solution of a Quadratic Equation Using Carlyle's Circle
New this month
The Plemelj Triangle via the Fixed Point of a Transformation
Algebraic Solution of the Plemelj Triangle Construction Problem
Alternative Plemelj Constructions of a Triangle
Construction of an SSA Triangle
The Double SubdivisionNetwork Method
Roulette (Hypotrochogon) of a Polygon Rolling inside a Circle
Cylindrical Anamorphosis of Some Popular Images
The Plemelj Construction of a Triangle
Constructing a Rectangle with the Same Area as a Pentagon
Tarski's Adaptation of Wojtowicz's Argument on Optimal Dissection of a Unit Square
Five Concyclic Points in a Triangle
Triangles with Equal Area Are Equidecomposable (Equivalent by Dissection)
Roulette (Hypotrochogon) of a Circle Rolling inside a Regular Polygon
Dissection and Reassembly of Parallelogram of Given Base and Altitude
Roulette (Hypotrochogon) of a Polygon Rolling inside Another Polygon
Roulette (Epitrochogon) of a Regular Polygon Rolling around Another Regular Polygon
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