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1设计说明1.1学情分析学生通过复习平行线、三角形、四边形、圆等图形的概念、性质及证明,积累了丰富的数学活动经验和数学思想方法,几何直观能力、推理能力有明显提升。图形的相似是九年级所学内容,由于学习时间紧、任务重、进度快,学生对这部分内容知识、技能、方法没有形成体系,因此本设计在复习基础知识的层面上,以课本知识为主线,以精选的例题为载体,系统整理知识脉络、提炼解题方法,面向中等学生适当拔高。1.2设计思想复习重点:平行线分线段成比例的基本事实;类
1 Design Description 1.1 Analysis of Academic Situation Students have accumulated rich experience in mathematical activities and mathematical thinking through reviewing the concepts, properties, and proofs of parallel lines, triangles, quadrilaterals, circles and other graphics. Geometrical visual abilities and reasoning abilities have been significantly improved. Due to the tight learning time, heavy tasks, and fast progress, the students did not form a system of knowledge, skills and methods for this part of the content. Therefore, this design, basing on the knowledge of textbooks, The main line, with selected examples as a carrier, systematically organize knowledge, refine the problem-solving methods, suitable for secondary students appropriate elevation. 1.2 Design Ideas Review the key points: parallel lines subdivided into sections of the basic facts; category