Quadrant
01
四分儀, 天体の高度を測定するための測定器具
a measuring instrument for measuring altitude of heavenly bodies
02
象限, 四分円
one-fourth of a circle, formed by two perpendicular radii and the connecting arc
例
Each quadrant of a circle represents one-fourth of the circle's area.
円の各象限は、円の面積の4分の1を表します。
03
象限, 四分円
any of the four areas into which a plane is divided by two orthogonal coordinate axes
04
象限, 四分円
a quarter of the circumference of a circle
