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學習活動四平行線法的原理
Author:
CIY
GeoGebra
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兩組對邊相等的四邊形
拼砌四邊形
三位數除以一位數（一）
兩位數加法
【案例】2013年安徽高考15题
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九點圓 (9-Point Circle)
香港貨幣
Parallelogram
二元线性规划的图解法(习题5)
球體
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Quadrilaterals
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Numbers
LCM and GCD
Prism