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Author:
karl.tecfreayk
GeoGebra
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三位數除以一位數（二）
兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
柱體建築師
画直线等分三角形的面积
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八年级数学竞赛之比例线段
千年曆
三角形內心
周界
繪畫平行四邊形
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Equilateral Triangles
Complex Numbers
Unit Circle
Plane Figures or Shapes
Sequences and Series