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Author:
孟宝兴
GeoGebra
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伊朗國旗 (Codex╱2026.10.07)
近似值：有效數字
中華民國國旗 (Codex╱2026.10.06)
幾何作圖題：切三圓（題目）
美國國旗 (Codex, 2026.10.06)
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認識常數函數關係式與圖形
三角形外心探討
梯形
圓錐截痕
圆的面积展开的副本
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Volume
General Quadrilateral
Differential Equation
Centroid or Barycenter
Secant Line or Secant