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李冠逸 拋物面反射
Author:
kevin20020905
GeoGebra
New Resources
三位數除以一位數（一）
四邊形的特性
找出對稱軸
兩組對邊相等和有直角的四邊形
錐體建築師
Discover Resources
正方體一筆畫
兩圓內公切線
找规律（数阵与点阵）
繡曲線
探索勾股三元数
Discover Topics
Median Value
Arithmetic Operations
Plane Figures or Shapes
Sine
Cuboid