平行线的判定与性质是平面几何中的重点内容之一,是在学习了几个有关角的概念和三线八角基础上进行研究的,对于培养学生的推理能力,为以后研究图形的性质奠定基础.有关平行线的判定与性质的题目历来是考试的重点,在初一下学期期末考试中,我校出了这样一道试题.尽管我校是市重点校,学生基础较好,但这道题目得分率才0.7,学生错误各种各样,教师很值得反思.下面就这道题目谈一谈认识和思考.1试题 The judgment and nature of parallel lines is one of the key contents in plane geometry. It is based on the study of several concepts about angle and three-line angle. It is of great importance to cultivate students’ reasoning ability and to study the nature of graphics later. The subject of the judgment and nature of parallel lines has always been the focus of the examination, in the first semester of the final exam, my school made such a test .Although our school is a city key school, student foundation is good, but the problem The score rate of 0.7, a wide range of student errors, teachers are worth reflecting on this topic to talk about understanding and thinking.1 questions