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初三奥赛:圆的切割线问题
Author:
王俊辉
拖动点P,或点D,改变其位置,探究点F的轨迹。
GeoGebra
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兩組對邊相等的四邊形
球体的体积推导
畫出對稱圖形
【案例】2013年安徽高考15题
拼砌四邊形
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由拉線80235螢橋國中
王濰平(8B) 作業
GeoGebra使用指南
folding aeroplane
单晨答重庆李琳
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Equations
Statistical Characteristics
Arithmetic Mean
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