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Grandpa's Dissection
Author:
John Golden
From a puzzle found at Alexander Bogomolny's Cut the Knot.
http://www.cut-the-knot.org/pythagoras/Proof99Solution.shtml
GeoGebra
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Exploring Simple Loci 探究簡單軌跡
探究由平行線和截線所成的角
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Equilateral triangle Square Dissection
Golden Ratio
Transformations - Sine Function
idek
Chapter 3 Activity 6
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Constructions
Curve Sketching
Sequences and Series
Parallelogram
Boxplot