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celia.su
GeoGebra
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画直线等分三角形的面积
【案例】2013年安徽高考15题
拼砌四邊形
直角坐標平面上的旋轉變換
畫出對稱圖形
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畢氏定理的證明
內擺線
Centroid
Geometry : Basic Elements (幾何: 基本元素)
正方形的邊長和周界
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Hyperbola
Calculus
Logic
Prism
Addition