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Izidor Hafner
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Demonstrations 361  380 of 859
Esser's Heart Surface
Engineering Drawings
Vega's Calculations of Logarithms
Solid Made of Rectangular Boxes Given by Three Views
Arrangements of Golden Prolate Rhombohedra
Sum of Numbers on Invisible Faces
Halving the Perimeter of a Zigzag Polygon
120 Rhombic Dodecahedra of the Second Kind Arranged in a Ball
Constructing the Cube Root of Two
Steinhaus' Billiard Ball Loop
Conway's Billiard Ball Loop
Halving the Perimeter of a HeartShaped Curve
Lindgren's Dissection of a Parallelogram to a Parallelogram
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 TwistHinged Dissection of Triangles
Lindgren's Dissection of a Quadrilateral to a Triangle
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