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平面几何主要是结合图形进行数与形的研究。下面结合自己的教学实践,谈谈如何充分利用几何图形,使学生牢固掌握基础知识,提高理解能力和逻辑推理能力的体会. 一、图形的演变学生学习几何,主要是在图形直观的基础上,通过对数量的大小和图形的大小、位置变化而形成感知的,这就需要在标准图形的基础上进行变化,在形变质不变中开阔视野,加深认识。如平行线分线段成比例定理中,直线b从右向左逐渐平行移动,形成有代表性的几个图形,使学生对这定理首次感知就能灵活多变,
Plane geometry is mainly combined with the figure to study the number and shape. The following combination of their own teaching practice, talk about how to make full use of geometric figures, so that students can firmly grasp the basic knowledge and improve understanding and logical reasoning experience. First, the evolution of graphics students learning geometry, mainly based on the graphical intuitive, By forming a perception of the magnitude of the number and the size and position of the graph, it is necessary to make changes on the basis of the standard graphs, to broaden the horizon and to deepen understanding. For example, in the propositional theorem of parallel line segmentation, straight line b moves gradually from right to left and forms a representative number of figures, so that students can be flexible and changeable when they first perceive the theorem.