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Author:
陳允杰
GeoGebra
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【案例】2013年安徽高考15题
找出對稱軸
兩組對邊相等的四邊形
錐體建築師
三位數除以一位數（二）
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圓形的西洋棋盤
圓的內接四邊形
判斷三角形
正六面體
小学奥数
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Real Numbers
Differential Equation
Quadrilaterals
Median Line
Similarity Transformation or Similarity