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二面角
Author:
qianqianhouhou
二面角的概念，拖动A、E点改变半平面
GeoGebra
New Resources
錐體建築師
球體建築師
兩位數加法
畫出對稱圖形
拼砌四邊形
Discover Resources
triangle
Ex5C#11
漂亮ㄉ東東
基础知识
动圆与两(相离)圆外切
Discover Topics
Logarithmic Functions
Coordinates
Integers
Special Points
Geometric Transformations