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二維碰撞
Author:
sunny
GeoGebra
New Resources
兩位數加法
【案例】2013年安徽高考15题
找出對稱軸
兩位數除以一位數（一）
錐體建築師
Discover Resources
永遠垂直、以像素為單位的向量？
坐標幾何（中一）
平面直角坐标系
Fractal
正圆台展开图
Discover Topics
Plane Figures or Shapes
Area
Vectors 2D (Two-Dimensional)
Expected Value
Geometry