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兩圓內外公切線
Author:
梅
GeoGebra
New Resources
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
兩位數加法
兩組對邊相等的四邊形
sanjiaohanshu
Discover Resources
圆锥曲线定义的拓展（卡西尼卵形线）
spinral
Copy of 固定周界的長方形的面積變化
cow function
公平的切蛋糕 Selfridge-Conway 免嫉妒分法(envy-free cake-cutting)
Discover Topics
Isosceles Triangles
Reflection
Congruence
Derivative
Normal Distribution