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Izidor Hafner
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Demonstrations 581  600 of 936
How Old Were Some Famous Mathematicians?
Sylvester's Postage Stamp Problem
Inconsistent Set of Statements
Heppes's TwoTip Tetrahedron
Trick to Multiply by N1 in Base N
Disappearing Lines in a Rectangle
Disappearing Lines around a Circle
Some Simple Logic Problems
Exercises in Limits from Above and Below
Multisecting an Angle Using Archimedes's Spiral
Equality of a Segment and an Arc in Archimedes's Spiral
Measuring Angles Using Diagonal Lines
Nicomedes's Mechanism for Constructing a Conchoid
Tangent to a Cycloid
Mechanism for Constructing Regular Polygons
Trisecting an Angle Using a Conchoid
Flexing Petrie's Honeycombs
Number of Cubes Removed
Projecting the Tangent Point of an Ellipse
Tangent to a Catenary
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