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Author:
吳秉沂
GeoGebra
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拼砌四邊形
兩位數除以一位數（二）
球體建築師
異分母分數減法
畫出對稱圖形
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偏心的農夫?
圓錐體內切球
勝者即正義，可愛即正義~
圆的面积展开的副本
【物理】引力波
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Tangent Function
Square
Geometry
Perimeter
Incircle or Inscribed Circle