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蝴蝶定理證明2：綜合法
Author:
連琨銘
GeoGebra
New Resources
畫出對稱圖形
柱體建築師
兩組對邊相等的四邊形
四邊形的特性
GeoGebra笔记功能体验课件
Discover Resources
記錄最大值
固定三角形的條件−題5
Quiz on Solving One-step Linear Equations (1) | 解「一步」一次方程：測驗(1)
拋物線的平移
矩形性质推论
Discover Topics
Polygons
Probability
Centroid or Barycenter
Equilateral Triangles
Circle