例谈应用向量法解高考立体几何题的价值

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立体几何题是高考中的必考题型,一般属于中等难度题目,是重要的得分题目.对于高中生来说,立体几何问题较难处理,它需要学生灵活运用点、线、面的知识,同时,也需要学生有较好的空间思维能力.用综合法解决这类问题比较耗时,也未必能顺利解决.在高考这种选拔性考试中,往往让学生得不偿失.而向量法则是通过把几何问题代数化,既降低了试题的难度,又有效提高了解题效率. Three-dimensional geometry is the college entrance examination exam questions, generally belong to the intermediate difficulty, is an important scoring problem.For high school students, the three-dimensional geometry is more difficult to deal with, it requires students to use point, line, surface knowledge, at the same time, Also need students to have better space thinking ability.With the comprehensive method to solve such problems more time-consuming, may not be able to successfully solve the entrance exam in this selective examination, often let students outweigh the benefits.The vector law is through the geometric problems Algebraic, not only reduces the difficulty of the test questions, but also effectively improve the efficiency of problem solving.
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