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Geometry
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Demonstrations 1  20 of 3721
Intersection of Three Polygonal Cylindrical Surfaces
New this month
Dissecting Two Bilinski Dodecahedra into a Cube
Regular Polygons of Edge Length Two
Arithmetic Mean, Geometric Mean, Root Mean Square and Harmonic Mean for Two Numbers
Fourier Series Approximations to Roots of Unity
Calendar on a Bilinski Dodecahedron
Folding Cosine in the Complex Plane
Projected Area of a Cuboid
Ruler and Compass Construction of a Square with Doubled Area
Shortest Distance between Two Skew Lines
Apollonian Circle Packings via Möbius Transformations of Hyperbolic Polygons
Parallel Lines Have the Same Slope
Right Tetrahedron: de Gua Theorem
Midpoint and Centroid Formulas
Approximating Pi Using Inscribed and Circumscribed Circles of Regular Polygons
SpaceFilling Fractal Curves
Wedging an Angle between Two Circles Produces a Limaçon
Centroids of Triangles with Vertices on the Unit Circle
Twisted Surfaces of Revolution
Coinciding Faces of Six Archimedean Solids
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