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Demonstrations 1  40 of 456
Doubling a Distance with a Compass
Updated this month
Maximize the Number of Vertices in an Equilateral Triangular Lattice
New this month
Trisecting an Angle Using the Cycloid of Ceva
Triangulating Random and Regular Polygons
Wheel Graphs with Integer Edges
Area of a Triangle in the Poincaré Disk
Triangle Altitude
Spherical Triangle Solutions
Japanese Theorem for Cyclic Polygons
Radial Tiling
Rotating Pythagoras
The Pedal and Antipedal Triangles
Exact Trilinear Coordinates
Orthologic Triangles
Geometric Series Based on Equilateral Triangles
Generalized Straightedge and Compass Fractal
Da Vinci's Construction of an Ellipse
Signed 2D Triangle Area from the Cross Product of Edge Vectors
Three Proofs of the Pythagorean Theorem
Congruent Numbers
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