1.设计说明.1.1学情分析在人教版数学教材八年级上册开始对三角形进行专项研究,这是学生接触几何学习以来第一次系统的、全面的认识.逐渐从小学的直观感受向逻辑推理以及研究问题的方法进行过渡.本专题是在学生研究了三角形的基本元素、特殊三角形,并探讨出确定一个三角形或者说两个三角形全等需要合适的三个条件后的一节综合实践课.学生与教师一起通过探究与实践得出了合适的三个条件能够确定一个三角形或 1. Design description .1.1 academic analysis In the PEP mathematics textbook eighth grade begin to carry out special research on the triangle, which is the first contact with the geometry learning students a systematic, comprehensive understanding. Gradually from the intuitive intuition of primary school logic Reasoning, and problem-solving methods.This topic is a comprehensive practical lesson after students have studied the basic elements of triangles, special triangles, and explored the three conditions that determine the properness of a triangle or two triangles, Students and teachers come together through inquiry and practice to find the right three conditions to determine a triangle or