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网格问题是中考题中的常见类型题。“网格”具有特有的优势,利用网格的特征,能得出线段间的平行、垂直等位置关系和线段间的数量关系,减少了不必要的繁杂的计算和繁难的证明,杜绝了简单的记忆、生搬硬套和机械计算,是学生的取分点。较之前几年的考查内容和形式,现在的网格题更加注重对学生能力的考查。本文选取几例分类评析,供参考。一、网格中的图形变换如:(2014年·安徽)如图,在边长为1个单位长
Grid problem is a common type of questions in the exam. “Grid ” has its own unique advantages. Utilizing the characteristics of the grid, we can get the parallel and vertical relationship among the segments and the relationship between the number of segments, reduce unnecessary complicated calculations and complicated proofs, and eliminate A simple memory, mechanically and mechanically, is the student’s point of separation. Compared with the previous years of examination content and form, the current grid problems pay more attention to the examination of students’ abilities. This article selected a few cases of classification for reference. First, the grid in the graphical transformation such as: (2014 · Anhui) As shown in the side length of 1 unit long