V2EX circumcenter

Circumcenter

释义 Definition

circumcenter(外心):在几何中,指三角形三条边的垂直平分线的交点;它到三角形三个顶点的距离相等,因此也是该三角形外接圆的圆心。(在其他图形中也可泛指“外接圆的圆心”。)

发音 Pronunciation (IPA)

/skmsnt/

例句 Examples

The circumcenter of a triangle is the center of its circumscribed circle.
三角形的外心是它外接圆的圆心。

Because the triangle is right-angled, its circumcenter lies at the midpoint of the hypotenuse.
因为这是直角三角形,它的外心位于斜边的中点。

词源 Etymology

circumcenter 由 **circum-**(“围绕、在周围”,源自拉丁语 circum)+ center(“中心”)构成,字面意思是“围绕(圆周)的中心”,对应几何里“外接圆的圆心”。

相关词 Related Words

文学与经典作品 Literary Works

  • Euclid, Elements(《几何原本》):讨论三角形外接圆与圆心等相关性质时,会涉及“外接圆圆心(circumcenter)”这一概念(现代英译与注释本中常用该术语)。
  • H. S. M. Coxeter, Introduction to Geometry(《几何学导论》):在三角形的特殊点(如外心、内心、垂心、重心)与圆的章节中使用该词。
  • George E. Martin, Geometric Constructions(《几何作图》):在“作三角形外接圆及其圆心”的作图与证明中出现该词。
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