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公切線的條數
Author:
李春培
公切線的條數
GeoGebra
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【案例】2018年全国1卷理科12题
画直线等分三角形的面积
柱體建築師
找出對稱軸
三位數除以一位數（一）
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二面角
区域面积
對摺平行四邊形
密鋪2
y=Sin(x)伸縮平移
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Equations
Similar Triangles
Geometric Mean
Perimeter
Arithmetic Operations