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20161223 第5題
Author:
3A516057 練鴻裕
GeoGebra
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球體建築師
兩位數加法
兩組對邊相等和有直角的四邊形
拼砌四邊形
找出對稱軸
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弦的中點軌跡
ex 7
學習單：三角形內(外)角合
廣義角
Solve ax + b = cx + d
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