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過圓內一點最短弦
Author:
李春培
過圓內一點最短弦
GeoGebra
New Resources
兩位數加法
四邊形的特性
四邉形 (四年級) 教師版
找出對稱軸
錐體建築師
Discover Resources
掃描不等式 (講義版)
GGB 基礎教學（平面幾何）
周考最后一题
鉛筆畫圓
加法与乘法
Discover Topics
Derivative
Incircle or Inscribed Circle
Optimization Problems
Fractions
Vectors 3D (Three-Dimensional)