1.
circumference
The perimeter or boundary line of a circle.
円周の長さを求める。
Calculate the length of the circumference.
円周は直径×πで計算できる。
The circumference can be calculated by diameter × π.
地球の円周は約4万キロメートルだ。
The Earth's circumference is about 40,000 kilometers.
円周 refers to the circumference (perimeter) of a circle. A mathematical term commonly learned in school.
FORMULAS:
- 円周 = 直径 × π
- 円周 = 2 × 半径 × π
COMMON EXPRESSIONS:
- 円周の長さ: the length of the circumference
- 円周を求める: to calculate the circumference
RELATED TERMS:
- 円周率: pi (π, approximately 3.14159)
- 直径: diameter
- 半径: radius
- 円: circle
- 面積: area