“角与相交线、平行线”是研究直线型的图形常见的内容,它们之间有着紧密的联系.1.借助角来研究平面内两条直线之间位置关系,反之,角的计算,角与角之间关系的探索与研究,大都以“相交线、平行线”知识作为依据和基础.2.以三角形为载体把平行线的性质和角的知识融合在一起,解决有关角的问题。它们也是研究“全等三6 ”Angle and intersection line, parallel line “ is to study the linear graphics common content, there is a close relationship between them.1. With the angle to study the relationship between two straight lines in the plane, on the contrary, the calculation of the angle , Angle and angle of the relationship between the exploration and research, most of the ”intersecting lines, parallel lines “ knowledge as the basis and basis of the triangle as the carrier of parallel lines of nature and angle of knowledge together to solve the Question of the corner. They are also research ”congruent three 6