Question 1065092
 I have to find the radius, {{{ r }}}
Use the length formula for points
( 12, -1 ) and
( 0, -1 )
{{{ r^2  = ( 12 - 0 )^2 + ( -1 -(-1) )^2 }}}
{{{ r^2 = 12^2 + ( -1 + 1 )^2 }}}
{{{r^2 = 12^2 + 0 }}}
Take the square root of both sides
{{{ r = 12 }}}
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Formula for circumference:
{{{ C = 2*pi*r }}}
{{{ C = 2*pi*12 }}}
{{{ C = 24*pi }}}
Formula for area:
{{{ A = pi*r^2 }}}
{{{ A = pi*12^2 }}}
{{{ A = 144*pi }}}