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Author:
Wong Ka Leong
GeoGebra
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撒针估算面积实验
龙形曲线-分形龙
活动三：应用性质
三角函数 的副本
直線的斜率：水平變化 & 鉛垂變化
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積分
平行2
Addition and Subtraction of Polynomials 2 (多項式的加減法2)
禪繞畫
正弦函數的伸縮及平移
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Rotation
Trigonometric Functions
Plane Figures or Shapes
Diagrams
Surface