GEOMETRY PLANE CURVES A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site arc Any part of a curved line or part of the circumference of a circle; the word comes from the Latin arcus for a bow, which also gives rise to "arch". Arc length is the distance along part of a curve. For a circle of radius r, the length (s) of an arc covering θ degrees on that circle is given by s = 2r × π × θ/360. If the angle is measured in radians the length of the arc is given by the product of the radius and the angle, i.e. s = r θ. The arc is said to subtend the angle θ at the center of the circle. Related categories    • GEOMETRY    • PLANE CURVES Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP