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Demonstrations 1 - 20 of 272
A Visual Proof of Viviani's Theorem
A Chinese Knight's Tour
An Infinite Knight's Tour
The Extouch and Intouch Triangles of a Triangle
The Knight's Tour
Total Areas of Alternating Subtriangles in a Regular Polygon with 2n Sides
The Sum of Opposite Angles of a Quadrilateral in a Circle is 180 Degrees
Comparing Sorting Algorithms on Rainbow-Colored Bar Charts
Triangle Altitudes and Circumradius
Another Variant of Kosnita's Theorem
The Begonia Point
An Application of the Gergonne-Euler Theorem
The Excentral Triangle and a Related Hexagon
Four Concyclic Points
A Concurrency from Midpoints of Arcs of the Circumcircle
A Concurrency of Lines through Points of Tangency with Excircles
A Concurrency from Six Pedal Points
Zeckendorf Representation of Integers
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