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橢圓的定義畫圖
Author:
SUN YUNG CHANG
GeoGebra
New Resources
兩位數加法
異分母分數減法
判斷球體
三位數除以一位數（一）
球體建築師
Discover Resources
外心
Rotation 旋轉變換
buji
周界平移
Copy of 小數的認識
Discover Topics
Plane Figures or Shapes
Coordinates
Means
Root
Logarithmic Functions