Question 948424
I'm assuming these are the endpoints of the diameter.
Use the distance formula to find the distance between the points, which would be the diameter, then divide by 2 to find the radius.
{{{D^2=(12/5-(-3))^2+(2/3-1/4)^2}}}
{{{D^2=(12/5+15/5)^2+(8/12-3/12)^2}}}
{{{D^2=(27/5)^2+(5/12)^2}}}
{{{D^2=729/25+25/144}}}
{{{D^2=104976/3600+625/3600}}}
{{{D^2=105601/3600}}}
{{{D=sqrt(105601)/60}}}
So then,
{{{R=sqrt(105601)/120}}}