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在初中数学中与“动”有关的问题一般都是教学中的难点,而这类问题对培养学生的思维品质和各种能力都有很大的促进作用.新课程实施以来,很多省、市的中考题中都以“动态几何题”作为压轴题,以2007年的全国各地的中考试题为例,约有70%的省市的中考试题中有动态几何题,以压轴题出现的约占43%.动态几何题是研究在几何图形的运动中,伴随着出现一定的图形位置、数量关系的“变”与“不变”性.这类试题集代数与几何的众多知识于一体,赋运动、开放、探索于一题,并且渗透了分类讨论、数形结合等数学思想方法,因此,它具有很
The problems related to “move” in junior high school mathematics are generally difficult in teaching. Such problems have a great role in promoting students’ thinking quality and various abilities. Since the implementation of the new curriculum, many provinces have In the city’s examination, “dynamic geometry questions” are used as the finale questions. Taking the middle school examination questions in 2007 across the country as an example, about 70% of the provinces and cities have dynamic geometry questions in the middle exam questions. Appeared about 43%. The dynamic geometry problem is to study the movement of the geometry, with the appearance of a certain number of graphics, the relationship between the “variable” and “invariable” nature of this kind of test set algebra and The many knowledge of geometry is integrated into one, giving movement, openness, and exploration to the subject. It also permeates mathematical thinking methods such as classification discussion and number and shape combination. Therefore, it has very