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拋物線相似
Author:
陳隆期
GeoGebra
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美國國旗 (Codex 版)
國旗 (作圖步驟直接餵給 Claude)
伊朗國旗 (Codex╱2026.10.07)
近似值：有效數字
幾何作圖題：切三圓（題目）
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simson line
銀杏葉
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圓心角
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Square
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Similar Triangles
Difference and Slope