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Polygons
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Demonstrations 201  220 of 494
Hanegraaf's Dissection of a Nonagon into a Triangle
Hinged Dissection of One Pentagram into Five Pentagrams
Langford's Dissection of Five Pentagons into One Pentagon
Largest Disk in a Convex Polygon
TwistHinged Dissection of Two Attached Squares into One Square
TwistHingeable Dissection of a WideTie Cross to a Square
TwistHingeable Dissection of an Ellipse into a Heart
Dissecting a Trapezoid into a Parallellogram
Hinged Dissection of a Decagon into Two Pentagons and Two Pentagrams
Dissecting a Generalized Greek Cross to a Square
Hinged Dissection of a Cross into a Square
Dissecting One Equilateral Triangle into Seven
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
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