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众所周知,在传统的平面几何中,三角形的垂心概念是依据三角形的“高线共点”属性来定义的.定义1三角形的三条高(所在的直线)必相交于同一点,这个点叫做三角形的垂心.在这里,三角形的“高线共点”属性是下定义的客观基础,是不可或缺的.然而,在传统的立体几何里,有的前辈却不顾四面体的四条高(所在的直线)一般并不交于同一点的事实(即四面体一般并无“高线共点”属性),硬把“四面体的垂心”定义为四条高(所在直线)的公共交
It is well-known that the concept of centripetality of a triangle is defined in the traditional plane geometry according to the triangle’s “high point total point.” Definition 1 The three highs of the triangle (where the line lies) must intersect at the same point. This point is called Here, the triangle “high line total point ” attribute is an indispensable definition of the objective basis, however, in the traditional three-dimensional geometry, some predecessors despite the tetrahedron four high (Where the line) generally do not pay the same fact (that is, the tetrahedron generally does not “high line common point ” attribute), hard to “tetrahedral vertical” is defined as four high (where the line) Public communication