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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
祖冲之的期望：内棋与外棋
垂直線的斜率
兩位數除以一位數（一）
直線的斜率
三位數除以一位數（一）
Discover Resources
圓形與相似形
直線與圓(直線方程式圖形特性1)
circuit
Copy of mearm機械手臂模擬
數學素養測驗卷
Discover Topics
Scatter Plot
Volume
Tangent Line or Tangent
Cuboid
Plane Figures or Shapes