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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
球體建築師
找出對稱軸
錐體建築師
兩位數除以一位數（一）
画直线等分三角形的面积
Discover Resources
start and end clock face
Primeter
凸透镜成像
分數的圖示的副本
双曲线定义
Discover Topics
Trigonometry
Complex Numbers
Curve Sketching
Tangent Line or Tangent
Natural Numbers