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蝴蝶定理
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
直角坐標平面上的旋轉變換
兩組對邊相等的四邊形
畫出對稱圖形
三位數除以一位數（一）
拼砌四邊形
Discover Resources
三角形内角和，演示
椭圆的参数方程
畢氏定理
長方體
線性組合的副本
Discover Topics
Distributions
Incircle or Inscribed Circle
Arithmetic Mean
Parametric Curves
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