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三巧板：題 2
Author:
Anthony OR 柯志明
GeoGebra
New Resources
Golden Rectangles and Golden Spirals
Flip 4 Coins
以竹簽拼砌三角形
Experiments with Transformations in the Plane
A note on Erdős’s mysterious remark
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Kreis 1
zoom
graphing
Start, Perpendicular to point on line
Kickoff 5.2 WDYN Perp Bi Circumcenter
Colorful Nautilus
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Continuity
Trapezoid
Differential Equation
Histogram
Standard Deviation