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20190530 與平行線有關的角
Author:
Hui Sir
GeoGebra
New Resources
第八周作业
兩位數加法
三位數除以一位數（一）
找出對稱軸
異分母分數減法
Discover Resources
Form 1(中一)
M05E Rate of Change 2
Apollonius Problem gergonne
ruler
探索勾股三元数
Discover Topics
Unit Circle
Differential Calculus
Arithmetic Mean
Exponent
Rectangle