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Triangles
Demonstrations 1 - 20 of 334
The Sum of the Interior Angles of a Triangle Equals 180 Degrees by Paper Folding
Triangles on a Sphere
The Johnson Circles
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
Rational Triangles with Area Less than 102
Packing Squares with Triangles
Recursive Exercises V: Nested Triangles
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