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Author:
johnmayhk
GeoGebra
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錐體建築師
兩位數加法
異分母分數減法
三位數除以一位數（一）
GeoGebra笔记功能体验课件
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圓內接四邊形 ABCD ...，求 sinθ=?
立方和
直角梯形
三角函數圖形（全）
八個方向
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Normal Distribution
Circle
Set Theory
Median Line
Polynomial Functions