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Untitled1
Author:
jane
GeoGebra
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兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
三位數除以一位數(二)
兩位數加法
畫出對稱圖形
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椭圆的定义
Triangles with the same height
題一
gjc090c23 圓內三角形與角度
任意角
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Natural Numbers
Addition
Incircle or Inscribed Circle
Dilation
Division