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Penrose 內凹小方塊
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GeoGebra
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中華民國國旗 (Codex╱2026.10.06)
算柱 (兩位數)
AI 訓練教室
幾何作圖題:切三圓(題目)
世界平面地圖 (Codex╱2026.10.07)
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包絡橢圓
happy planet
Copy of 固定周界的長方形的面積變化
雪櫃裏的食物
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