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fold and unflod the cone with geogebra5.0
Author:
qianqianhouhou
drag point C
GeoGebra
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近似值：有效數字
國旗 (作圖步驟直接餵給 Claude)
幾何作圖題：切三圓（題目）
國旗 (Claude 版)
中華民國國旗 (Codex╱2026.10.06)
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圖一
外心
三角形
二面角
單點透視法
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Angles
Rectangle
Geometric Transformations
Translation
Parallelogram