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Author:ddc1130

橢圓包絡

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祖冲之的期望：内棋与外棋
空间中两直线的位置关系
画直线等分三角形的面积
常见四边形是否是双心四边形
平行線的斜率

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Sum of Exterior Angles of Polygons 多邊形外角和
最小值
生日悖論
大園寶
堆朵4邊形(試算表版)

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Trapezium
Boxplot
Differential Calculus
Optimization Problems
Vectors

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