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动态几何问题已成为中考试题的一大热点题型.这类试题以运动的点、线段、变化的角、图形的面积为基本条件,给出一个或多个变量,要求确定变量与其他量之间的关系,或变量在一定条件为定值时,进行相关的几何计算和综合解答.解答这类题目,一般要根据点的运动和图形的变化过程,对其不同情况进行分类求解.本文以2014年江苏无锡卷第28题为例,谈谈此类问题的思路突破与解题反思,希望能给大家一些启发.
Dynamic geometry problem has become a hot topic exam questions.This type of test questions to the movement, line segments, the angle of change, the area of the graph as the basic conditions, given one or more variables, requiring the determination of variables and other quantities The relationship between variables, or variables in certain conditions for the value of the relevant geometric calculation and comprehensive answer.To answer such questions, generally based on the point of the movement and the graphics of the process of change, the classification of their different situations.This paper 2014 Jiangsu Wuxi volume 28 as an example, to talk about the breakthrough of these ideas and problem-solving reflection, hoping to give you some inspiration.