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拋射問題
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
畫出對稱圖形
兩位數加法
三位數除以一位數（一）
錐體建築師
找出對稱軸
Discover Resources
Three-phase electric power
斯霍滕(Schooten)定理(與角平分線定理等價)
正七角錐(旋轉，實體、透視)
桃子Peach
圆锥曲线的产生
Discover Topics
Cuboid
Cylinder
Vectors
Limits
Arithmetic