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1引言北京中考数学几何综合题向来以创新和难度著称,一直引起广大师生的关注.一方面,试题对考生的几何基础、推理能力、抽象能力和论证能力等方面具有很高的要求;另一方面,试题背景新颖、内涵丰富思想深刻、方法质朴,对考生具有很好的区分功能.同时,也为初中数学教学指明了方向.但通过调研听课发现,由于试题的难度较大,很多教师在讲解时遇到了一些困难,如试题的内涵阐述不全面等.本文将以2012,2014,2015年几
1 INTRODUCTION The mathematics synthesis problem in Beijing senior high school entrance examination has always been famous for its innovation and difficulty, which has aroused the concern of teachers and students.On the one hand, the test questions have very high requirements on the geometry, reasoning ability, abstraction ability and argumentation ability of the examinee. On the one hand, the examination questions are new in background, rich in connotation, deep in thought and simple in approach, which have very good distinguishing function for the candidates, meanwhile, they also indicate the direction of junior high school mathematics teaching.But through the investigation and lectures discovery, due to the difficulty of test questions, many teachers Encountered in the explanation of some difficulties, such as the content of the test is not comprehensive, etc. This article will be 2012, 2014, 2015 in a few