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19.1-1 椭圆的标准方程和性质
Author:
GeoGebra Institute of WuXi
GeoGebra
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球体的体积推导（优化版）
四邊形的特性
畫出對稱圖形
兩位數除以一位數（一）
拼砌四邊形
Discover Resources
三角形三邊關係
數線上的有理數
試算表應用
Conics
等比数列计算练习
Discover Topics
Continuity
Exponent
Scalene Triangles
Bar Chart or Bar Graph
Circumcircle or Circumscribed Circle