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Properties of a Rectangle
Author:
Lttcmooc
GeoGebra
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近似值：有效數字
找出對稱軸
兩位數加法
錐體建築師
判斷球體
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圓的平移
sinα + sinβ > 0 ?
齿轮咬合
國旗
比較3個分數大小
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Terms
Median Value
Centroid or Barycenter
Parallelogram
Vectors