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众所周知,平行线和垂线一样都是处理几何问题的常用方法之一.在高中数学中,笔者发现若能恰当用好平行线(平移直线)对快速解题起到事半功倍的效果.下面是笔者对有关距离、斜率、参数、截距等问题运用平行线(平移直线)进行析疑解惑,突显平行线的魅力,焕发新的活力.1用好平行线解决有关距离问题有这样的数学问题,用传统的代数方法处理运算复杂、抽象、无从下手;若用极端思想处理,化抽象为
As we all know, parallel lines and vertical lines are the same as one of the commonly used methods to deal with geometric problems in high school mathematics, I found that if properly used parallel lines (translation straight line) to solve problems faster play a multiplier effect. Using the parallel lines (translation straight lines) to analyze the distance, slope, parameters, intercepts and other questions, we can highlight the attractiveness of the parallel lines and give full play to the new vitality.1 To solve the problem of distance by using parallel lines, there are such mathematical problems, Using traditional algebraic methods to deal with complex computing, abstract, impossible to start with; if treated with extreme ideas, the abstract is