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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
異分母分數減法
柱體建築師
找出對稱軸
三位數除以一位數（二）
兩位數除以一位數（二）
Discover Resources
錐體建築師 3
藝術著色2
多項式
勝者即正義，可愛即正義～(可用Ctrl+滑鼠滾輪放大界面)
angle between 2 planes 03
Discover Topics
Trigonometric Functions
Scalene Triangles
Vectors 3D (Three-Dimensional)
Complex Numbers
Similar Triangles