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在平面几何的学习中,初中学生往往对图形所表达的几何含义模糊不清,致使推理论证无从下手。因此,应重视平面几何的识图教学。一、抓概念、图形、几何语言的结合,形成“图”“文”对应信号系统平面几何研究的对象是平面图形,教学“概念”时,应遵循“从生动的直观到抽象的思维”这一规律,先给出图形让学生观察,运用分析、比较,概括等思维方法,给概念以确切的定义,并用符号语言表述,使概念与图形,几何语言与图形紧
In the study of plane geometry, junior middle school students tend to vague the geometric meaning expressed by the graphic, which makes the reasoning argument impossible to start with. Therefore, should pay attention to the plane geometry of the figure teaching. First, grasping the combination of concept, figure and geometry language and forming the corresponding signal system of “figure” and “article” The object of plane geometry research is plane graphic. When teaching “concept”, it should follow “from vivid intuition to abstract thought” A regular pattern, first give the students to observe the graphics, the use of analysis, comparison, generalization and other thinking methods to the exact definition of the concept, and the use of symbolic language to make the concept and graphics, geometric language and graphics tight