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Quadrant
01
a measuring instrument for measuring altitude of heavenly bodies
02
one-fourth of a circle, formed by two perpendicular radii and the connecting arc
Example
Each quadrant of a circle represents one-fourth of the circle's area.
The angle of a quadrant is 90 degrees because it is formed by two perpendicular radii.
03
any of the four areas into which a plane is divided by two orthogonal coordinate axes
04
a quarter of the circumference of a circle
