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Demonstrations 1 - 20 of 465
Congruence Classes of Geoboard Triangles
Triangle Altitudes and Circumradius
Folding a Strip to Converge to an Equilateral Triangle
Arbitrary Curves of Constant Width
Iteratively Reflecting a Point in the Sides of a Triangle
Halving a Triangle
Another Variant of Kosnita's Theorem
Trisecting an Angle Using the Cycloid of Ceva
How Many Triangles in a Six-Pointed Star?
Spherical Pythagorean Theorem
Repeatedly Subdividing Triangles through Special Points
Halving a Triangle Perimeter
Some Polyhedra with Identical Triangular Faces
Octahedra Constructed from Eight Identical Triangles
Non-Euclidean Triangle Continuum
Doubling a Distance with a Compass
Maximize the Number of Vertices in an Equilateral Triangular Lattice
Triangulating Random and Regular Polygons
Wheel Graphs with Integer Edges
Area of a Triangle in the Poincaré Disk
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