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proof30黃煒皓
Author:
郭亮偉
GeoGebra
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兩組對邊相等和有直角的四邊形
直角坐標平面上的旋轉變換
畫出對稱圖形
GeoGebra笔记功能体验课件
兩位數除以一位數（二）
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Jiawen Yun
九點圓
圓內接正N邊形
題三
旋轉的概念
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Equations
Kite
Vectors
Arithmetic Mean
Combinatorics