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圆锥曲线定义的拓展（卡西尼卵形线）
Author:
梁航宇
GeoGebra
New Resources
畫出對稱圖形
異分母分數減法
【案例】2013年安徽高考15题
四邊形的特性
算柱 (兩位數)
Discover Resources
用兩圓編織美麗的曲面
Quiz on Partial Variation 部分變：測驗
Locus: Fixed Distance From Line Segment
Rectangle
外心
Discover Topics
Tangent Line or Tangent
Mode
Cube
Isosceles Triangles
Kite