周三径一 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
径 jìng
HSK 6
narrow path; diameter; direct
一 yī
HSK 1
one; a, an; alone