Points A and B lie on a circle with radius 1, and arc ⌢/ AB has a length of π 3 . What fraction of the circumference of the circle is the length of arc ⌢ /AB ?

Points A and B lie on a circle with radius 1, and arc

AB

has a length of

π
3

. What fraction of the circumference of the circle is the length of arc

AB

?