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任务9：内凹的正方形
Author:
陈丽婷
GeoGebra
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國旗 (作圖步驟直接餵給 Claude)
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三半圓間的相切圓(Codex╱2026.10.07)
AI 訓練教室
四邊形的特性
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【三角函數】sinx的平移
摩天輪
分數(約分)
多边形外角和的副本
平行四邊形面積的副本
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Limits
Orthocenter
Parallelogram
Parabola
Vectors 3D (Three-Dimensional)