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Geometry
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Demonstrations 1881 - 1900 of 3914
Dissecting a Cross of Lorraine into a Square
Faces of the Regular Icosahedron and Five Regular Tetrahedra
Cross Sections of Three Solids
Blended Fonts
Projections of Polyhedra Stellation
Great Circles on Mercator's Chart
Problems on Circles V: External and Internal Common Tangents
Separating Points by a Line or Parabola
Testing a Polygon for Convexity and Self-Intersection
A General Cone
Locating the Complex Roots of a Quadratic Equation
Graph of Inequalities
Equal Cores and Shells in Circles and Spheres
An Example of the Bolyai-Gerwien Theorem
Lagrange's Four-Square Theorem Seen Using Polygons and Lines
Three Equal Segments from the Altitudes of a Triangle
Ratios Involving Six Radii
Circumcircles of Two Midpoints and an Altitude
Parking a Car
The Path of the Rear Wheels of a Bus
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