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相交、共线和相同
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Using Algebra in Geometry
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圆和圆锥曲线
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Altitudes and Perpendicular Distance, in Coordinates
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坐标系内的斜率、直线和平面
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坐标
回顾:什么是笛卡尔坐标?
直线的参数化
在坐标系内用手工的方法求面积
坐标系内的斜率、直线和平面
相交、共线和相同
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