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在学习《三角形三边关系》时,发现在教学中存在如何有效落实“两点间距离最短”与三角形“三边关系”教学脱节的现象及如何有效地让学生真正地理解三角形的三边关系。教学实践中为了有效地突破教学重、难点,应从实际情境中找准切点,获取直观感知;在动手操作中落实目标,获得理性认识;在逻辑推理中提升能力,促进学生全面、可持续发展。
When learning the Trilateral Triangle, we find that there are some problems in teaching such as how to effectively implement the teaching of “the shortest distance between two points” and the teaching of “Trilateral Relations” and how to effectively enable students to understand triangles Trilateral relations. In teaching practice, in order to effectively break through teaching difficulties and difficulties, we should find out the cut-off point from the actual situation and gain the intuitional perception; implement the goal in the hands-on operation to obtain the rational understanding; enhance the ability in logical reasoning to promote the students’ overall and sustainable development .