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垂直是一种特殊的相交,指的是两条直线相交成直角.解答垂直条件的求值和判断问题时,要注意从垂直的定义入手,利用好垂直的两条直线相交所成的任意一个角是直角的性质.一、垂直条件的求值问题
Vertical is a special intersection, referring to the intersection of two straight lines at a right angle. To answer the evaluation of vertical conditions and determine the problem, we should start from the definition of vertical, the use of good vertical two straight lines of any one The angle is a right angle. First, the evaluation of the vertical conditions