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Author:
Ricky Chan
GeoGebra
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兩位數除以一位數（一）
【案例】2013年安徽高考15题
兩組對邊相等和有直角的四邊形
判斷球體
異分母分數減法
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封閉區域著色
[問題] 線在面上
P.5_FRACTION_NPMPS
拋物線4--平行四邊形法
二项分布
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Multiplication
Geometric Transformations
Rectangle
Centroid or Barycenter
Piecewise Functions