円周(えんしゅう)

えんしゅう
noun
circumference
science
1. circumference
The perimeter or boundary line of a circle.
円周(えんしゅう)の長(なが)さを求(もと)める。
Calculate the length of the circumference.
The circumference can be calculated by diameter × π.
The Earth's circumference is about 40,000 kilometers.

円周(えんしゅう) refers to the circumference (perimeter) of a circle. A mathematical term commonly learned in school.

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