以不在同一直线上的三点为顶点,自然可以作出一个三角形.实际是三角形的三个顶点.本文讨论的问题是,如果三点不作为三角形的顶点,而是与三角形有关的其它一些特殊点,是否也能确定三角形?所谓“确定”是 The three vertices that are not in the same line can naturally make a triangle, which is actually the three vertices of the triangle. The problem discussed in this article is that if the three points are not the vertices of the triangle but the other special points related to the triangle Is it OK to determine the triangle? The so-called “OK” is