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在中学学习中,向量作为一种重要工具有着广泛的应用,文[1]中列举了直线的方向向量在直线中的应用几例,本文试着对直线方向向量与法向量的应用作一系统阐述,以供参考。一、相关性质由教材及文[1]知,直线方向向量与法向量相关概念与性质如下。(1)直线上的向量及与它平行的向量都称为直线的方向向量,与直线垂直的向量称为直线的法向量.(2)若P_1(x_1,y_1),P_2(x_2,y_2)分别是直线上
In middle school, vector is widely used as an important tool. In [1], a few examples of the application of straight line direction vector in straight line are listed in this paper. This paper attempts to make a systematic study on the application of straight line direction vector and normal vector Elaboration, for reference. First, the relevant nature of textbooks and text [1] known, the linear vector and the normal vector related concepts and nature are as follows. (1) The vector on the line and the vector parallel to it are all called the vector of the line, and the vector perpendicular to the line is called the normal vector of the line. (2) If P_1 (x_1, y_1), P_2 (x_2, y_2) Respectively, on the straight line