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國旗
Author:
李俊儀
GeoGebra
New Resources
兩位數除以一位數（二）
算柱 (兩位數)
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
拼砌四邊形
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數位學習社103 12 15
扇形:圖片與動畫使用
立方體的截平面
讀磅
公平的切蛋糕 Selfridge-Conway 免嫉妒分法(envy-free cake-cutting)
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Continuity
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Rhombus
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