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Rose 玫瑰
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GeoGebra
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撒针估算面积实验
正方形雪花图案
活动三：应用性质
中华人民共和国国旗
龙形曲线-分形龙2
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兩外切圓之外公切線作圖法
周界-平移法(教學練習一)
內公切線長
指令
正方体表面积11种展开图
Discover Topics
General Quadrilateral
Incircle or Inscribed Circle
Functions
Rectangle
Vectors 2D (Two-Dimensional)