在脍灸人口的《几何明珠》里,汪江松、黄家礼同志曾对三角形的九点圆作过一番精彩的描述和系统的论证。所谓三角形的九点圆,是指“任意三角形的三条高的垂足、三边的中点,以及垂心与顶点的三条连线的中点,这九点共圆”(见《几何明珠》P.138)。本文的目的是介绍一个由笔者发现的新的九点圆。叙述如下:如图1所示,△ABC为不 In the “Gelumined Pearl” of the moxibustion population, Comrades Wang Jiangsong and Huang Jiali made some wonderful descriptions and systematic arguments on the nine-point circle of the triangle. The so-called triangular nine-point circle refers to the “three points of the vertical foot of an arbitrary triangle, the midpoints of three sides, and the midpoints of three lines connecting the vertical center and the vertex. These nine points are all round” (see “Pearl of Geometry” P .138). The purpose of this article is to introduce a new nine-point circle discovered by the author. The description is as follows: As shown in Figure 1, △ABC is not