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数学中的“格点问题”考查了学生对方格纸中的图形的理解,对学生的观察力和对规律的探究能力要求比较高,体现了“数形结合”的数学思想方法,还体现对学生的创新意识考查,是中考作图中的热点题型,其题型多样,涉及的知识点十分广泛,综合性很强,下面以几例介绍“格点问题”。一、与图形变化相关的问题(2013·泰安中考题)在如图1所示的单位正方形网格中,△ABC经过平移后得到△A1B1C1,已知在AC上一点P(2.4,2)平移后的对应点为P1,点P1绕
In mathematics, “lattice problem” examines the student’s understanding of the graph in the graph paper, which has higher requirements on students’ ability of observation and law exploration, and reflects the mathematical method of “combination of numbers and numbers” , But also reflects the student’s innovative awareness test, is the exam in the exam of the hot problem type, the question is diverse, involving a wide range of knowledge points, highly comprehensive, the following to introduce a few cases “lattice point ”. In the unit square grid shown in Figure 1, △ ABC after translation obtained △ A1B1C1, known in the AC point P (2.4,2) translation After the corresponding point P1, P1 around