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三圓外切
Author:
AlexWang
GeoGebra
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【案例】2018年全国1卷理科12题
兩位數除以一位數（二）
拼砌四邊形
兩組對邊相等和有直角的四邊形
球體建築師
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部分佔全部的百分率: 例1
幾何鋪磚 3, 4, 6 邊形
Homework8
Area between two curves
三角形的分割與組合(1)的副本
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Constructions
Functions
Parallelogram
Hypergeometric Distribution
Equations