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Author:
Ricky Chan
GeoGebra
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兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
畫出對稱圖形
判斷球體
兩組對邊相等的四邊形
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國中(1-1等線段作圖)
How tall is that?
向量的分解（非垂直）
中心对称与轴对称图形.许兴华数学
sin(x) 的函數圖形的副本
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Perimeter
Optimization Problems
Statistics
Plane Figures or Shapes
Cube