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Demonstrations 1  20 of 171
Any Triangle Can Tile
Rømer's Measurement of the Speed of Light
Ruler and Compass Construction of a Square with Doubled Area
Buffon's Needle Experiment for Three Types of Grids
Colorcoded Country Comparison
Euclid 1.47 Animated
Graphical Solution of a Quadratic Equation Using the Arithmetic and Geometric Mean
Graphical Solution of a Quadratic Equation Using a Result from Optics
Power Voting Systems Like the United Nations Security Council
Polyhedra, Spheres, and Cylinders
Sphere Rolling on Rails
The Sum of Opposite Angles of a Quadrilateral in a Circle is 180 Degrees
Bell's Theorem
Equidistance and Betweenness in Euclidean Plane Geometry
Archimedean Solids
Platonic Solids
OilDrop Experiment
Detailed Analysis of Rutherford Scattering of Alpha Particles
World Energy: Electricity, Oil, and Gas
Calculating the Earth's Circumference at Any Date from Any Location
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