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GeoGebra
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拼砌四邊形
【案例】2018年全国1卷理科12题
錐體建築師
【案例】圆柱体内放置一个大球六个小球
画直线等分三角形的面积
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範例：畫圈圈的筆
過圓內C點的弦中點軌跡
Apollonius Problem 6 CLP Inversion 34
Tusi Couple
Angle Sum of Triangle