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每年中考完毕,认真分析全国各省市部分中考试卷后,发现都会有求阴影面积的试题.由此可知:计算阴影面积是中考的一个常考题型.阴影图形一般都是不规则图形,常规解法是将不规则图形分割转化为扇形、弓形、三角形等规则图形求解.但有些试题却难以转化,此时需要运用一些特殊方法与技巧,将它化繁为简,化难为易,达到巧妙求解目的.下面以几道中考题为例,给同学们介绍求阴影面积的几种巧妙方法
Each year in the exam is completed, a careful analysis of the provinces and cities in the country part of the examination paper, found that there will be a shadow area of the test. Thus we can see: Calculate the shadow area is a common test questions .Shadow graphics are generally irregular graphics, the conventional solution is The irregular graphics segmentation into fan, bow, triangle and other regular graphics solution.However, some questions are difficult to transform, this time need to use some special methods and techniques, it is complicated, simple and difficult, to achieve clever solution. In the following several exam questions, for example, to introduce students to seek shadow area several clever ways