最近,我们学习了轴对称图形.有的问题要求添一笔后,使新图形成为轴对称图形.在解决这类问题时,我常因找不全而苦恼.后来我发现,若是先找对称轴,就可以顺利突破这个难点!问题如图1,点A,B,C都在正方形网格(每个小正方形的边长为1)的格点上.请你再找一个格点D,使点A,B,C,D组成一个轴对称图形.解析:若是在网格上一一尝试的话,难度较大,且很费时间.根据轴对称图形的性 Recently, we learned about axisymmetric graphics, and after some problems were asked to make the new graphics an axisymmetric graphics, I often get distressed when trying to solve such problems. Later on, I found out that if I first look for the axis of symmetry , You can successfully break through this difficult problem! The problem shown in Figure 1, the points A, B, C are in the square grid (each small square side length of 1) grid. Please find a grid D Point A, B, C, D form an axisymmetric graphics. Analysis: If one try on the grid, then the more difficult and time-consuming.According to the axis of symmetry