根据三点坐标计算角度（python，三维坐标，向量法）

https://blog.csdn.net/shengyutou/article/details/119670615?utm_term=python%E7%9F%A5%E9%81%93%E4%B8%89%E4%B8%AA%E7%82%B9%E7%9A%84%E5%9D%90%E6%A0%87%E6%B1%82%E6%9F%90%E4%B8%AA%E7%82%B9%E7%9A%84%E8%A7%92%E5%BA%A6&utm_medium=distribute.pc_aggpage_search_result.none-task-blog-2~all~sobaiduweb~default-0-119670615-null-null&spm=3001.4430

标签：python,E5%,E6%,E7%,82%,坐标,E4%,B8%,向量
来源： https://www.cnblogs.com/liutianrui1/p/16452699.html