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Demonstrations 121 - 140 of 625
Four Polyhedra, Each with an Unfolding that Overlaps Itself
Deduce the Net for a Die's Net
Two Dissections of the Letter E to a Square
Decomposition into Isosceles Triangles with Angles That Are Multiples of Pi/4
The Sum of the First n Odd Numbers
A Twist-Hinged Dissection of Triangles
Lindgren's Dissection of a Quadrilateral to a Triangle
Calendar on Dodecahedron
Make Mazes on a Moebius Strip
Dissection of One Quadrilateral to Another
Dudeney's Step Dissection of a Rectangle to a Square
A Sequence of Inscribed Platonic Solids
Deduce the Net for an Octahedral Die
Calculating Logarithms with a Series
Two Dissections of a Mitre to a Gnomon
Swing-and-Twist-Hinged Dissection of an Octagon to Two Octagons
Twist-Hinged Dissection of One Pentagon to Four
Piano-Hinged Dissection of an Ellipse to a Heart
Decomposition of Some Polygons to Iso-Penta Triangles
Twist-Hinged Dissection of One Parallelogram into Another with the Same Angles
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