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正4正8黏合
Author:
Wu Xiao-Ren
GeoGebra
New Resources
四邊形的特性
三位數除以一位數（二）
找出對稱軸
拼砌四邊形
兩位數除以一位數（二）
Discover Resources
proof ASA
Expectation Value 期望值
proof24 羅文頡
Homework1
雙曲線3--等軸法
Discover Topics
General Quadrilateral
Sine
Mode
Stochastic Process or Random Process
Volume