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根据现行中学教学大纲的规定,在平面几何第二章三角形的最后部分,是研究基本作图和三角形的作图问题。为什么要研究基本作图?为什么在这里才提出基本作图问题?研究基本作图问题在整个平面几何教材中有什么作用?如何将这部分教材教好学好?这里个人提出一些初步看法,供同志们在教学中的参考。一、研究基本作图和三角形作图在平面几何中的地位作用。 1.为什么要研究几何作图同题? (1)从几何学研究的对象来看: 几何学,是以研究几何图形的形状、大小和位置关系来作为本身研究的对象。教材在绪论一章及三角形的等量问题和不等量问题中,研究这些图形性质的时
According to the provisions of the current secondary school syllabus, the last part of the triangle in the second chapter of plane geometry is to study the basic mapping and triangle mapping. Why do you want to study basic drawings? Why is the basic mapping problem proposed here? What is the role of studying the basic mapping problem in the entire plane geometry textbook? How do you teach this part of the textbook well? Here are some personal preliminary ideas for comrades Their reference in teaching. First, study the role of basic mapping and triangle mapping in plane geometry. 1. Why do you want to study the geometric mapping problem? (1) From the perspective of the object of geometric study: Geometry is based on the study of the shape, size and position of geometric shapes as the object of their own research. Textbooks in the Introduction section and the triangles of equal and unequal problems, when studying the nature of these graphs,