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观察近几年的中考试卷,在几何综合题型中,面积问题成为中考试题的常客.主要以面积为载体,考查怎样运用数形结合建立函数关系式,怎样运用面积之间的关系求未知量.其中常用到的方法有:面积公式法;面积割补法和面积关系转化法.本文举例说明上述几种常见方法在几何题型中的运用.一、面积公式法面积公式法,常用在建立函数关系式题型上,用自变量把三角形的底与高表示出来,
Observed in recent years, the middle school exam paper, geometry in the questions, the area problem becomes a frequent visitor to the exam questions. The main area of the carrier as a carrier, how to use the combination of numbers to establish a functional relationship, how to use the relationship between the area to find the unknown amount Among them commonly used methods are: the area formula method; area cut compensation method and area relationship conversion method.This article illustrates the use of several common methods in the geometric problem type A. Area formula method of area formula, commonly used in the establishment of Function-related questions on the type, with arguments to the triangle at the bottom and high out,