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关于椭圆的一个性质
Author:
孟宝兴
GeoGebra
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球体的体积推导（优化版）
拼砌四邊形
球體建築師
畫出對稱圖形
兩組對邊相等的四邊形
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複數
Simultaneous Linear Equations 聯立二元一次方程
兩圓滾動軌跡
S3 Ch4.3 試做4.6a 三視圖(3D圖)
展開圓面積 (講義版)的副本
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Conditional Probability
Boxplot
Functions
Plane Figures or Shapes
Triangles