“distance from a point to a line(in the plane)”的概念、定义、翻译、参考文献-科学参考

单词	distance from a point to a line(in the plane)
释义	distance from a point to a line(in the plane) Mathematics The distance from the point P to the line l is the shortest distance between P and a point on l. It is equal to \|PN\|, where N is the point on l such that the line PN is perpendicular to l. If P has coordinates (x₁,y₁) and l has equation ax + by + c = 0, then the distance from P to l is equal to $\frac{\| a x_{1} + b y_{1} + c \|}{\sqrt{a^{2} + b^{2}}},$ where \|ax₁ + by₁ + c\| is the absolute value of ax₁ + by₁ + c.
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