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几何多项选择题因考查知识点多,知识综合性强,技巧运用要求高而成为历年各省市中考试题的选择、填空的压轴题,学生对解此类问题因无具体方法且错误率高而感到恐惧,因此此类问题往往成为学生学习中的一个软肋.本文就此类问题的解题技巧作一探究.一、抓住核心条件,逐个验证真假性例1如图1,矩形OABC中,OA=2OC,D是对角线OB上的一点,OD=2/3OB,E是边AB上的一点,AE=4/9AB,反比例函
Multiple choice of geometry due to more knowledge of the test points, comprehensive knowledge, high skills required to use the test provinces and cities over the years as the choice of test questions, fill in the blanks of the finale, students solve such problems due to no specific method and the error rate is high Fear, so these problems often become a weakness in student learning.This article on this type of problem-solving skills to explore.First, to seize the core conditions, one by one to verify the authenticity of the example 1 as shown in Figure 1, rectangular OABC, OA = 2OC, D is a point on the diagonal OB, OD = 2 / 3OB, E is a point on the side AB, AE = 4 / 9AB, inverse proportion