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例题2（P点可拖动）
Author:
杜洋
GeoGebra
New Resources
Earth with coastline
AI 訓練教室
美國國旗 (Claude 版)
直角坐標平面上的旋轉變換
畫出對稱圖形
Discover Resources
兩圓內外公切線
door
平移法（三）
Sunline
正八角錐(旋轉，實體、透視)
Discover Topics
Scatter Plot
Straight Lines
LCM and GCD
Statistics
Area