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本文拟通过归类解析的形式具体说明:分析、解决有关立体几何问题时,往往需要考虑常用数学思想在解题中的灵活运用.一、数形结合思想数形结合思想,就是在研究问题的过程中,注意把数和形结合起来考查,斟酌问题的具体情形,把图形性质的问题转化为数量关系的问题,或者把数量关系的问题转化为图形性质的问题,使复杂问题简单化,抽象问题具体化,化难为易,获得简便易行的成功方案.例1.一个几何体的三视图如图所示,其中正视图是一个正三
This paper intends to specify the form of classification analysis: analysis, solve the problem of three-dimensional geometry, often need to consider the commonly used mathematical ideas in the problem-solving flexible use.First, the number of combination of ideological number with thought, is the study of the problem In the process, pay attention to the combination of numbers and shapes to examine, consider the specific circumstances of the problem, the graphic nature of the problem into a quantitative relationship between the number of questions, or the relationship between the quantitative nature of the problem into a graphical nature of the complexity of the problem simplistic and abstract Problem specific, difficult as easy, access to simple and easy success program Example 1. A geometric view of the three as shown, where the front view is a positive three