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Author:
季阳天
GeoGebra
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兩位數加法
四邊形的特性
拼砌四邊形
兩組對邊相等的四邊形
【案例】2013年安徽高考15题
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用面積逼近圓周率
中線定理(阿波羅尼奧斯)定理
gjh-f03-00 司乃耳定律
Copy of Fill a special area
平行四邊形的面積的副本
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Pie Chart or Circle Chart
Correlation
Rectangle
Prism
Ratios