方程与不等式是刻画现实世界的有效模型,是解决许多实际问题的重要工具。不少与几何图形有关的计算问题都往往可以转化为方程或不等式问题来解决。现举例说明,供大家复习时参考。一、与相交线有关问题例1如图1 Equations and inequalities are effective models that portray the real world and are important tools for solving many practical problems. Many computational problems relating to geometry can often be solved by solving problems of equations or inequalities. Here is an example for reference when reviewing. First, problems related to intersecting lines Example 1 is shown in Figure 1.