平面直角坐标系是研究数与形的重要工具,随着新课程的全面实施,与平面直角坐标系相关的中考题与时俱进,令人耳目一新.现选取几例,供你学习时参考.一、规律探究型例1(2016年岳阳卷)如图1,在平面直角坐标系中,每个最小方格的边长均为1个单位长,P_1,P_2,P_3,…,均在格点 Plane Cartesian coordinate system is an important tool to study the number and shape. With the full implementation of the new curriculum, the examination questions related to Plane Cartesian coordinate system keep pace with the times and are refreshing. First, the law of exploration Example 1 (2016 Yueyang volume) As shown in Figure 1, rectangular coordinate system in the plane, each side of the smallest cell length are 1 unit length, P_1, P_2, P_3, ..., are in the grid point