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勾股树
Author:
acchu
GeoGebra
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拼砌四邊形
【案例】2018年全国1卷理科12题
畫出對稱圖形
三位數除以一位數（二）
【案例】2013年安徽高考15题
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圓周角與弦切角
正方體內的三角錐
永春高中研習
直角坐標與極坐標的轉換
S3 Ex4.3 Q06(3D圖)
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Differential Equation
Optimization Problems
Sequences and Series
Addition
Inequalities