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Demonstrations 61 - 80 of 356
Dissecting a Decagon into a Pentagram and Two Pentagons
Dissecting a Cross of Lorraine into a Square
Polygons on n Vertices
Cross Sections of Three Solids
Testing a Polygon for Convexity and Self-Intersection
An Example of the Bolyai-Gerwien Theorem
Lagrange's Four-Square Theorem Seen Using Polygons and Lines
Dissecting an Even-Sided Regular Polygon into Rhombuses
Length of the Projection of a Rotating Polygon
Paper Size Series A
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
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