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同位角__水平平行綫
Author:
chanfushun
GeoGebra
New Resources
異分母分數減法
兩位數除以一位數（一）
兩位數加法
判斷球體
兩組對邊相等和有直角的四邊形
Discover Resources
ghseh 二次函數描點法頂點法-2
Test
周界-平移法(練習四)
認識半徑
第八周作业3
Discover Topics
Random Variables
Means
Cosine
Arithmetic Operations
Circle