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Author:
Cathyyu920311
GeoGebra
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找出對稱軸
画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
拼砌四邊形
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邊長與三角形（二）
四角柱體（長方體）的截面
甚麼是球體
題一
時鐘
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Constructions
Derivative
Prism
Histogram
Quadratic Functions