如何判断两个法向量指向相同还是相反？_OpenScirbe Publishing

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如何判断两个法向量指向相同还是相反？

Author(s)：
徐晓阳

Publication Title：

Wen Yuan (High School Edition) 2021 No.04

Affiliations：
黑龙江省大庆市第四中学黑龙江大庆 163711

Abstract：
随着高中新课改的全面推进，立体几何中的二面角问题一直是高考的热点，成为解答题中的必出题目。而向量法是解决该问题常用的方法。该方法简单实用，便于掌握。用法向量解答二面角问题时，学生常困惑于二面角大小与其半平面法向量的夹角的关系是相等还是互补，即难以准确判断法向量的方向。本篇文章从多个视角为为学生解答这个困惑。

Keywords：
立体几何；二面角；法向量

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[1] 徐晓阳.如何判断两个法向量指向相同还是相反？[J].Wen Yuan (High School Edition),2021(04),.

文渊(高中版)

Wen Yuan (High School Edition)

Language: 中文

CN：11-9276/G

ISSN：2096-6288

Publication Frequency: 月刊

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