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Izidor Hafner
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Demonstrations 361  380 of 672
Rolling One Parabola on Another
Find the Angle Measure in a Regular Polygon, Part 2
Theobald's Dissection of an Octagon into a Triangle
Function Identification Game
Circular Slide Rule
Graham's Square Root Extractor
Polar Maze
Mazes on a Cone, Including Its Base
Geometric Problems of Antiquity
Generalized Trisection Construction
Extra Accuracy Using Diagonal Lines
The Eratosthenes Machine for Finding the Cube Root of Two
Trisection by Sliding a Line
Pascal's Angle Trisection
Theobald's Dissection of a Heptagon to a Pentagon
Find the Angle Measure in a Regular Polygon
Lindgren's Dissection of a Pentagon to a Hexagon
Dissection of a Maltese Cross to a Square
Dissecting a Dodecagram {12/2} to a Square
Dissection of a Dodecagram {12/5} to a Square
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