Question 192239
use pythagorean theorem
:
where hypothenuse is length of the radius
:
one leg is 1/2 of the length of the chord 
:
and the other leg(lets call a) is our unknown (distance from center of circle to chord
:
{{{a^2+7^2=12^2}}}
:
{{{a^2=95)}}}
:
{{{a=sqrt(95)}}}=9.75 inches