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艾宾豪斯错觉
Author:
许业成
GeoGebra
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龙形曲线-分形龙
斐波那契螺旋弧线(表格法-可动态调节)
折扣
百分數及其應用
平行線的判定
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waaachen
三條線上的正三角形
平行線
旋轉對稱
基础知识
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Numbers
Integral Calculus
Rectangle
Integers
General Quadrilateral