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解析几何中，已知P1（x1，y1）、P2（x2，y2），其间的距离由公式来求，但在涉及到直线与曲线相交等问题时，两点问的距离若用这个公式来求解，会显得复杂，而通过恰当的转化，则简单易求．这里总结常见的距离计算的转化方式，供复习参考．1距离与斜率的转化求直线与曲线相交时
In analytical geometry, P1 (x1, y1) and P2 (x2, y2) are known, and the distance between them is calculated by the formula, but when it comes to the intersection of a straight line and a curved line, the distance between two points is used in this formula. Solving will appear complicated, but through proper transformation, it will be simple and easy. Here is a summary of the common distance calculation conversion method for review reference. 1 Transformation of distance and slope When intersecting a straight line with a curve