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数豆豆
GeoGebra
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撒针估算面积实验
三角函数 的副本
直線的斜率：水平變化 & 鉛垂變化
盈利與虧蝕
第八周作业3
Discover Resources
邱子芸的ggb book
用數值滑桿控製物件顯示條件
All you need is
到點與線段距離相等
三角函数诱导公式的副本
Discover Topics
Geometric Distribution
Special Points
Translation
Pythagoras or Pythagorean Theorem
Sequences and Series