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Geometry
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Demonstrations 2121  2140 of 3037
Cycloid Curves
Areas of Parallelograms and Trapezoids
Protractor Practice
Golay Code
Balls Rolling on a Sphere
The Multiplication Parabola
Finding a Tangent Line to a Parabola
Visual Computation of an Integral
A Concurrency from Circumcircles of Subtriangles
A Concurrency from the Midpoints of Line Segments through the Circumcenter
A Concurrency from the Reflections of the Contact Points with the Excircles
Skewed Cone
Arc Length of Cycloid
Turning a Punctured Torus Inside Out
A Concurrency from a Point and a Triangle's Excenters
Crazy Surfaces
The 57Cell
Concyclic Points from Reflections of the Circumcenter about the Altitudes
Two Hinged Dissections
Möbius Strip as a HalfTwisted Square Torus
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