四面体重心的性质陕西省武功县５７０２厂中学王丕直杨明皓四面体作为空间图形，应有四种重心：（ｉ）顶点集合的重心；（ｉ）棱集合的重心；（ｉｉ）表面图形的重心；（ｉｖ）几何体的重心．与三角形的情形相一致，四面体的体积重心与顶点重心相重合，简称为四面体的重心... The Nature of Four Gravity Centers The 5702 Factory Middle School in Wugong County, Shaanxi Province Wang Weizhi Yang Mingquan Tetrahedron as a spatial pattern, should have four types of center of gravity: (i) the center of gravity of the vertex set, (i) the center of gravity of the edge set, and (ii) the center of gravity of the surface pattern; (iv) The center of gravity of the geometry. Consistent with the situation of the triangle, the tetragonal volume center of gravity coincides with the vertex center of gravity, referred to as the tetrahedron’s center of gravity...