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Author:
朱亮
GeoGebra
New Resources
畫出對稱圖形
拼砌四邊形
球体的体积推导（优化版）
找出對稱軸
三位數除以一位數（一）
Discover Resources
平方數平方數
proof24 羅文頡
直線交點
標準分解式2
点动成线
Discover Topics
Rotation
Sphere
Incircle or Inscribed Circle
Hyperbola
Line Segment