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依据新课程标准,学生通过探究平行线中的“折线成角”问题,利用平行线的相关知识点,学会识别基本图形、构建基本图形、理清解题思路,体会图形之间变化及联系,激发学生兴趣,从而增强学生的识图和逻辑推理能力。本文旨在利用解决平行线中的“拐角”问题的方法求解“折线成角”问题,目的是无需利用平行线的性质,只需判断拐角的方向和角度,从而达到解题的目的。七年级学生在以前的学习中已经学习了有关直线、线段、
According to the new curriculum standard, students can learn the basic graphics, construct the basic graphics, clarify the solutions and understand the changes between the graphics by using the knowledge of parallel lines to explore the problem of “polyline angulation ” in the parallel lines Contact, stimulate student interest, thereby enhancing students’ knowledge and logical reasoning ability. The purpose of this paper is to solve the problem of “polyline angulation” by using the method of solving the “corner” problem in parallel lines. The purpose of this paper is to solve the problem of cornering by simply using the properties of parallel lines without judging the direction and angle of the corner purpose. Seventh grade students in previous studies have learned about the straight line, line segments,