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投影和视图是空间与图形的重要内容,也是中考新题型的好素材.投影与视图的新题型主要有:一、开放发散型例1(2014年汕尾卷)写出一个在三视图中俯视图与主视图完全相同的几何体.解析:球的俯视图与主视图都为圆,正方体的俯视图与主视图都为正方形,答案可以从球或正方体中任意选一个.温馨小提示:熟悉三视图的概念和常见几何体的三视图是解题的前提.
Projection and view space and graphics is an important part of the new exam is also a good material for the new type of projection and view the new questions are: First, open divergence Example 1 (2014 Shanwei Volume) Write a three-view Top view and the main view exactly the same geometry. Analysis: The ball top view and the main view are round, square top view and the main view are square, the answer can be selected from a ball or cube. The concept and common geometry of the three views is the premise of solving problems.