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教学素材：正余弦函数及其反函数
Author:
清风拂琴，陌上花开
GeoGebra
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双心四边形
第八周作业3
三角函数 的副本
常见四边形是否是双心四边形
第八周作业2
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孔明棋 (Peg Solitare)
利用Geogebra說明線性函數的圖形性質
Light reflected in ellipse
閱讀鐘面及數字鐘（時和分）的副本
平移練習
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Means
Exponential Functions
Logarithmic Functions
Geometric Transformations
Parametric Curves