Question 964419
.
{{{((1/3)radians)((180degrees)/(pi))=19.1degrees}}}
Let C=circumference of the circle; r=radius
{{{(19.1degrees/360degrees)=3cm/C}}} 
{{{19.1C=1080}}}
{{{C=1080/19.1}}}={{{56.5cm}}}
{{{(pi)2r=C}}}
{{{r=C/(2(pi))}}}
{{{r=(56.5cm)/(2(pi))}}}
{{{r=9cm}}}
ANSWER: The radius of the circle is 9 centimeters.