一、教材分析本课是人教版七年级数学上册第四章几何图形初步的第一节“几何图形”。学生在小学阶段已经学习了几何图形中的平面图形,如正方形、平行四边形、三角形、圆形、梯形等,也学过了基本的边、面积等的计算。这部分内容的教学是对前期学习的承接和深化,学生接触的新知识主要是在立体知识上。二、教学内容几何图形包括平面和立体图形,是研究物体形状、大小和位置关系的知识,数学的几何图形学习不包括物体物理或化学等特 First, the textbook analysis This lesson is the seventh chapter of the People’s Education Publishing House Chapter fourth geometry preliminary “geometry ”. Students have learned in elementary school Plane graphics, such as squares, parallels, triangles, circles, trapezoids, etc., have also learned the basics of calculating the area, area, etc. This part of the content of teaching is to undertake and deepen the early learning, new knowledge students contact is mainly in the three-dimensional knowledge. Second, the teaching content Geometry, including plane and three-dimensional graphics, is to study the shape, size and location of knowledge, mathematical geometry does not include the study of physical or chemical objects