论文部分内容阅读
点到直线的距离公式,已有许多证法散见于数学书刊。本文再给出一种简单而巧妙的证法。题求证点P(x_0,y_0)到直线l:Ax+By+C=0的距离d=|Ax_0+By_0+C|/(A~2+B~2)~(1/2)。
From point to line distance formula, there are many evidences scattered in mathematics books. This article gives a simple and ingenious proof. The proof point P (x_0, y_0) to the line l: Ax+By+C=0 is the distance d=|Ax_0+By_0+C|/(A~2+B~2)~(1/2).