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投影与视图是初中数学的新内容.在中考中,多以选择题、填空题等小题形式出现,题目不难,但容易出错,现把解题中的各种错误归纳如下.一、审题不认真导致失误例1(2016年娄底卷)下列几何体中,主视图和俯视图都为矩形的是()错解:选D.错解分析:想到三棱柱的侧面都是矩形,于是直接选D,没有看清题目要求主视图和俯视
Projection and view is a new content of junior high school mathematics in the senior high school entrance examination, mostly in the form of multiple choice, fill in the blank questions and other small problems, the title is not difficult, but easy to make mistakes, now the problems in the solution are summarized as follows. Do not seriously lead to mistakes Example 1 (2016 Loudi volume) The following geometry, the main view and the top view are rectangular () wrong solution: Select D. Decomposition Analysis: Think of the triangular prism side are rectangular, so the direct election D , Did not see the title requirements of the main view and overlooking