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椭圆内反射
Author:
zhen chen
GeoGebra
New Resources
四邉形 (四年級) 教師版
球体的体积推导（优化版）
判斷球體
畫出對稱圖形
GeoGebra笔记功能体验课件
Discover Resources
GGBScript
給錐體一個名字 4
向量的伸縮
約分BB
放射狀旋轉圖形(3)
Discover Topics
Trigonometry
Sine
Cosine
Correlation
Incircle or Inscribed Circle