论文部分内容阅读
两条直线垂直,即一条直线与另一条直线的夹角为直角,是直线与直线之间的一种特殊位置关系.两条直线垂直有多种表征方式,而等差幂线定理则是判定线线垂直的一个充要条件,十分有用.本文将首先用向量法证明等差幂线定理,接着给出其多种变式(推论),最后结
The two straight lines are perpendicular, that is, the angle between one straight line and another straight line is a right angle. It is a special positional relationship between a straight line and a straight line. The two straight lines have a variety of characterization methods, and the isobaric power line theorem is a judgment. A necessary and sufficient condition for the vertical line is very useful. In this paper, we will first prove the equal-difference power line theorem by the vector method, and then give its various variants (inference), and finally