nine-point circle

短语

词形变化

nine-point circles 复数 nine-point circles

别名

nine points circle

释义与例句

n.
  1. 1.

    That circle which passes through the feet of the altitudes of a given triangle.

词源

So called because the circle passes through nine points of interest: the feet of the three altitudes, the centers of the three sides, and the midpoints of the segments which join the triangle's vertices with its orthocenter.

来源：wiktionary