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GeoGebra
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双心四边形
撒针估算面积实验
斐波那契螺旋弧线（表格法）
异形操场
第三周作业效果演示
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Fill a special area
底圖為兩函數，截面為正方形
Helicoid
指數1209
指数函数的副本
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Right Triangles
Equations
Arithmetic
Tangent Function
Conic Sections