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圓的展開partII
Author:
連琨銘
GeoGebra
New Resources
兩位數除以一位數（一）
判斷球體
兩位數除以一位數（二）
兩組對邊相等的四邊形
找出對稱軸
Discover Resources
圆锥曲线包络
圓錐曲線圖輯
正方形推垛
椭圆内部全等的双椭圆构造.许兴华数学
時距計算機 (時針改變)
Discover Topics
Cylinder
Unit Circle
Intersection
Arithmetic Mean
Secant Line or Secant