1.问题的提出.这是海淀区初三年级下半学期的一道中考模拟题,很多教师在试卷讲评中采取了放弃第三问的态度,笔者认为本题整体的讲解是学生思维能力提升的一个很好的契机,因此对其进行了较为深入的思考,期待能给大家一些启示.2.案例分析.2.1题目呈现.题目:在△ABC中,AB=AC,将线段AC绕着点C 1. The question is raised. This is the third semester of Haidian District, the second semester of a senior high school entrance examination simulation questions, many teachers in the papers commentaries to take the attitude of giving up the third question, I think the overall explanation of the problem is a student thinking ability to enhance Very good opportunity, so it conducted a more in-depth thinking, looking forward to give you some inspiration .2 case analysis .2.1 title is presented. Title: △ ABC, AB = AC, the line AC around point C