关于三角形的一个不等式三角形ABC内一点p,p点到三边的垂线分别为PD,PE,PF,则对于平面上任意一点M,PD*AB+PE*AC+PF*BC小于等于MD*AB+ME*AC+MF*BC,请问这是为什么?这是什么不等式吗?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 11:03:55
![关于三角形的一个不等式三角形ABC内一点p,p点到三边的垂线分别为PD,PE,PF,则对于平面上任意一点M,PD*AB+PE*AC+PF*BC小于等于MD*AB+ME*AC+MF*BC,请问这是为什么?这是什么不等式吗?](/uploads/image/z/10342255-31-5.jpg?t=%E5%85%B3%E4%BA%8E%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E4%B8%80%E4%B8%AA%E4%B8%8D%E7%AD%89%E5%BC%8F%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E5%86%85%E4%B8%80%E7%82%B9p%2Cp%E7%82%B9%E5%88%B0%E4%B8%89%E8%BE%B9%E7%9A%84%E5%9E%82%E7%BA%BF%E5%88%86%E5%88%AB%E4%B8%BAPD%2CPE%2CPF%2C%E5%88%99%E5%AF%B9%E4%BA%8E%E5%B9%B3%E9%9D%A2%E4%B8%8A%E4%BB%BB%E6%84%8F%E4%B8%80%E7%82%B9M%2CPD%2AAB%2BPE%2AAC%2BPF%2ABC%E5%B0%8F%E4%BA%8E%E7%AD%89%E4%BA%8EMD%2AAB%2BME%2AAC%2BMF%2ABC%2C%E8%AF%B7%E9%97%AE%E8%BF%99%E6%98%AF%E4%B8%BA%E4%BB%80%E4%B9%88%3F%E8%BF%99%E6%98%AF%E4%BB%80%E4%B9%88%E4%B8%8D%E7%AD%89%E5%BC%8F%E5%90%97%3F)
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