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同心圓

Author:倪若雲

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拼砌四邊形
画直线等分三角形的面积
【案例】2013年安徽高考15题
判斷球體
兩組對邊相等的四邊形

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Angle of Elevation & Angle of Depression 仰角和俯角
day01_04
sin,cos比大小
向外延伸的多邊形
拋物線6-包絡線法

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Conic Sections
Statistical Characteristics
Boxplot
Trigonometry
Histogram

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