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Author:
Altmann Cho
GeoGebra
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異分母分數減法
找出對稱軸
【案例】2018年全国1卷理科12题
柱體建築師
三位數除以一位數（二）
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Locus 軌跡(2T)
把三角形分類
圍周
試算表的很多正方形
正n邊形與圓上點的中點軌跡(解析)
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Diagrams
Hypergeometric Distribution
Means
Secant Line or Secant
Differential Calculus