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Demonstrations 21  40 of 526
The Sum of Opposite Angles of a Quadrilateral in a Circle is 180 Degrees
Four Kinds of Rhombic Polyhedra
Folding Hexagons
Interior and Exterior Angles of Regular Polygons
Freese's Dissection of a Regular Pentadecagon into Two
Freese's Dissection of a Regular Dodecagon into a Regular Hexagon and the Reverse
Variant of Freese's Nonagonal Double Ring Expansion
Freese's Dissection of a Regular Decagon into Five
Freese's Dissection of a Regular Dodecagon into Three Congruent Squares
Freese's Dissection of a Regular Dodecagon into Two Equilateral Triangles
Freese's Dissection of Three Squares into Four Regular Dodecagons
Freese's Dissection of a Regular Nonagon into Two
Freese's Dissection of a Regular Octagon into Nine
Freese's Dissection of a Regular Pentagon to a Square
Freese's Dissection of Two Regular Pentagons into a Square
Freese's Dissection of a Regular Octagon into Four
Freese's Dissection of a Regular Dodecagon into Three
Freese's Dissection of a Regular Starlike Nonagram into Three Equilateral Triangles
Freese's Dissection of a Regular Pentagon into Two Smaller Ones
Freese's Two Dissections of a Regular Pentagon into Five
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Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
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