Arc
Related Category: Mathematics
in geometry, a curved line or any part of it; in particular, a portion of the circumference of a circle. The length
s of an arc of a circle of radius
r and subtending a central angle of &thgr; radians is
s=
r&thgr;; if &thgr; is measured in degrees, then the arc is given by
s=2&pgr;
r&thgr;/360.
