周三径一 zhōu sān jìng yī

old rule: circle's circumference is 3 times diameter

Word data

HSK Not in HSK
Frequency Unknown

Definitions

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

Characters

Character Meaning
周 zhōu HSK 3
week; all; complete
三 sān HSK 1
three; 3; surname San
径 jìng HSK 6
straight; diameter; track
一 yī HSK 1
one; 1; single