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“角与相交线、平行线”是图形认识中最基础的知识,它们之间又有着紧密的联系.如: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,解决三角形全等问题.它们也是研究“全等三角形、相似三角形、四边形、圆”等其它知识的工具和基础,将有关的计算问题、推理论证问题,转化为这几类知识点来解决.
“Angle and intersection line, parallel line ” is the most basic knowledge of graphics understanding, there is a close relationship between them.As: 1. With the angle to study the position of the relationship between the two lines in the plane, the opposite corner Calculation, angle and angle of the relationship between the exploration and research, most of the “intersecting lines, parallel lines ” knowledge as a basis and basis for the triangle as the carrier of parallel lines of nature and angle of knowledge together to solve They are also tools and foundations for studying other kinds of knowledge such as “congruent triangles, similar triangles, quadrilaterals, circles,” and so on, and solve problems related to computational problems and reasoning and argumentation into these kinds of knowledge points.