A quarter circle is one quarter of a circle, namely a circular arc with central
angle 
radians (
). For radius 
, its arc length is
 |
The region bounded by a quarter circle and two perpendicular radii is a quarter-disk.
Quarter Circle
See also
Circle, Circular Arc, Circular Sector, Quadrantal Angle, Quarter-Disk, SemicircleExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Quarter Circle." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/QuarterCircle.html