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几何题中辅助线的重要性不言而喻,恰当的辅助线能化难为易,有时如果不添加辅助线就无法证明.从某种意义上看,辅助线决定证题的方法:辅助线不同,证题方法也往往不同.下面从一道2014年绍兴中考压轴题的辅助线角度展开合理的联想,以引起同学们对辅助线、解题后的反思、模式识别的重视.一、问题的缘起题目:(2014年绍兴)如图1,在平面直角坐标系中,直线l平行x轴,交y轴于点A,第一象限内的点B在l上,连结OB,动
The importance of the auxiliary line in the geometry problem is self-evident, the appropriate auxiliary line can be difficult to be difficult, and sometimes can not be proved without the auxiliary line. In a sense, the auxiliary line determines the method of the syndrome: the auxiliary line is different , The method is also different from the certificate the following from a 2014 Shaoxing entrance exam finale auxiliary point of view to start a reasonable association to arouse students on the auxiliary line, after the solution of the reflection, pattern recognition attention. Title: (2014 Shaoxing) Figure 1, in a rectangular plane coordinate system, the straight line l parallel to the x-axis, cross the y-axis at point A, the first quadrant B in the l, the link OB, move