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兩圓動點中點軌跡
Author:
楊秀珠
GeoGebra
New Resources
直角坐標平面上的旋轉變換
【案例】2013年安徽高考15题
三位數除以一位數（一）
四邊形的特性
找出對稱軸
Discover Resources
公因數與公倍數
Constructing Quadrilaterals by Four Sides (2014)
三角函數 Cos X 函數圖形
周界
面積題 E
Discover Topics
Rotation
Vectors 2D (Two-Dimensional)
Solids or 3D Shapes
Centroid or Barycenter
Secant Line or Secant