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小數的認識（一）
Author:
Paul Li
,
Tse Sir
GeoGebra
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幾何作圖題：切三圓（題目）
算柱 (兩位數)
四邊形的特性
AI 訓練教室
國旗 (作圖步驟直接餵給 Claude)
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平行四邊形之變奏I
反演(Inversion)
積分求面積
立体几何
伊朗國旗 (Codex╱2026.10.07)
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Centroid or Barycenter
Translation
Circumcircle or Circumscribed Circle
Rotation
Kite