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Author:
杜耀宗
GeoGebra
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三位數除以一位數(二)
錐體建築師
【案例】2013年安徽高考15题
画直线等分三角形的面积
判斷球體
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電子幾何條
ggb-fs-a3 用物件表示分數比例
異分母的分數加減
Direct and Inverse Variation 正變與反變
IMO2014C
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Optimization Problems
Geometric Mean
Natural Numbers
Line Segment
Rotation