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Polygons
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Demonstrations 141  160 of 428
Dissecting a Square into a Sphinx
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 SelfIntersection
An Example of the BolyaiGerwien Theorem
Lagrange's FourSquare Theorem Seen Using Polygons and Lines
Dissecting an EvenSided Regular Polygon into Rhombuses
Length of the Projection of a Rotating Polygon
Pentahex Puzzles
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 2Column Polyominoes on the Hexagonal Lattice
Three Hinged Dissections of Squares
Polyform Explorer
The Excentral Triangle and a Related Hexagon
Roulette: A Comfortable Ride on an ngon Bicycle
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