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excenter of triangle
Author:
user7951
GeoGebra
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美國國旗 (Codex 版)
幾何作圖題：切三圓（題目）
伊朗國旗 (Codex╱2026.10.07)
美國國旗 (Codex, 2026.10.06)
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方格紙上畫梯形2
Rectangle _03
Conic section
軌跡觀察---模擬摺紙
骨牌
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General Quadrilateral
Geometric Mean
Tangent Line or Tangent
Algebra
Triangles