“distance from a point to a line”的概念、定义、习题解题方法及翻译-数学辞典

单词

distance from a point to a line

释义

distance from a point to a line

(in the plane) 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

where |ax1 + by1 + c| is the absolute value of ax1 + by1 + c.

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数学辞典收录了4151条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。