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一、写在前面五种尺规基本作图(除了最基本的作线段)分散于(人教版)教材的各个部分,跨越2章的空间,这种编排不利于培养学生的基本作图技能,也不利于学生发散思维的培养.作一个角等于已知角的作图是在八年级上册第12章第37-38页12.2的例1之后安排的;八年级上册第12章12.3一节第48页的第一个思考之后,安排了角的平分
First, the basic rules of drawing (in addition to the most basic line segments) written in the first five rules (in addition to the most basic line segment) are scattered in various parts of the (PEP) textbook, spanning 2 chapters of space. This arrangement is not conducive to the development of students’ basic drawing skills. It is also not conducive to the development of students’ divergent thinking. Making a graph with a corner equal to a known angle is arranged after Example 1 of 12.2 of Chapter 8 of the eighth grade first volume; Chapter 8 of the eighth grade is 12.3 Section 12. After the first thought on page 48, we arranged the halve of the horn