Question 981519
r, radius
{{{pi*r^2=154}}}
{{{r^2=154/pi}}}
{{{r=2*7*11}}}


c, circumference
{{{c=2pi*r}}}
{{{c=2pi(2*7*11)}}}
{{{c=4*7*11*pi}}}


Arc length removed, 7.3 cm.


Central Angle is  {{{(7.3/(4*7*11*pi))*360}}}, degrees.