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常用對數
Author:
顏銓志 ycj
GeoGebra
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四邊形的特性
【案例】2018年全国1卷理科12题
三位數除以一位數（一）
柱體建築師
找出對稱軸
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Apollonius Problem 7 CCP Inversion simple
S3 Law of Indices
外心垂心問題
橢圓軌跡
面积
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Rectangle
Diagrams
Percentages
Translation
Fractions