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Triangles
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Demonstrations 141  160 of 442
Triangles in the Poincaré Disk
Knopp's Osgood Curve Construction
Incircles in Right Triangles
The Conway Circle
Median Theorem for Polygons
Lucas Circles
Kenmotu Circle
Area of a Triangle in the Poincaré Disk
A Dissection Proof of Pythagoras's Theorem
The Torricelli Point
Theorem of the Equal Incircles
Folding an Equilateral Triangle in a Square
The Malfatti Problem
Enumerating Pythagorean Triangles
Pólya's SpaceFilling Curve
The Eutrigon Theorem
A Concurrency from the Reflection of the Incircle's Contact Points across the Incenter
Concurrency via Midpoints
A Triangle Formed by the Centers of Three Circles
Concurrency Induced by a Cevian
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