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Author:: GeoGebra Institute of Hong Kong

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[教学] 三角函数线4: 画面显示优化
[教学] 三角函数线3：函数的绘制
艾宾浩斯错觉
面积解题
来画个立体几何吧

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弦的中點軌跡
對稱圖形
同心圓
三角函数图象
纏繞畫2

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Similar Triangles
Cuboid
Scatter Plot
Circle
Intersection

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