周三徑一 zhōu sān jìng yī

DEFINITIONS

  1. circumference of a circle is proverbially three times its radius

CHARACTERS

周 zhōu
HSK 3
Zhou dynasty; circumference
三 sān
HSK 1
three
徑 jìng narrow path; diameter; direct
一 yī
HSK 1
one; a, an; alone