Japanese word

円周

Pronunciation

Romajienshū

Meaning

  • nouncircumference

Example

円の円周を計算します。en no en shū o kei san shi ma su

I calculate the circumference of the circle.

Illustration for 円周 (circumference)

More examples

この円の円周は約20センチです。ko no en no en shū wa yaku 20 se n chi de su

The circumference of this circle is about 20 centimeters.

Core concept

Refers to the distance measured along the complete curved edge of a circle.

Common phrases

  • 円周を測るen shū o haka ru

    measure the circumference

  • 円周を求めるen shū o moto me ru

    find the circumference

  • 円周上の点en shū ue no ten

    point on the circumference

Similar words

周長shūchō: The total length of the boundary enclosing a plane figure.
外周gaishū: The boundary or its length along the outside of a figure or object.

Definition in Japanese

円の曲線に沿って一周したときの長さ。en no kyoku sen ni so tte ichi shū shi ta to ki no naga sa

Word origin

This Sino-Japanese compound joins 円 (en, "circle") and 周 (shū, "around") to make 円周 (enshū), the distance around a circle.

Usage tips

  • The distinction between circumference for a circle and perimeter for a polygon helps separate 円周 (enshū) from the general idea of a boundary length.

Word lists with this word