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Demonstrations 61 - 80 of 344
A Regular Polygon with an Even Number of Sides Is the Union of Rhombuses
The Polar and Bipolar of a Convex Polytope
Theobald's Dissection of a Heptagon to a Triangle
Simple 2-Column Polyominoes on the Hexagonal Lattice
Three Hinged Dissections of Squares
The Excentral Triangle and a Related Hexagon
Roulette: A Comfortable Ride on an n-gon Bicycle
Iso-Optic Curve of a Regular Polygon
Albrecht Dürer's Nonagon of 1525
Albrecht Dürer's Heptagon of 1525
Plato's Shadow Problem
Center of Mass of a Polygon
A Test for the Convexity of a Quadrilateral
Reflecting a Regular Polygon across Its Sides in the Hyperbolic Plane
Dividing Circles, Rectangles, and Triangles into Equal Pieces
Tiling the Hyperbolic Plane with Regular Polygons
Folding a Trapezoid into Two Different Rectangles
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