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圆锥曲线的第二定义
Author:
小数点爱数学
Topic:
Conic Sections
圆锥曲线的第二定义
GeoGebra
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判斷球體
兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
畫出對稱圖形
【案例】2013年安徽高考15题
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Roger Test Draw
parallelogram
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用几何概型估计pi值
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