Question 860263
Use the distance formula to calculate the length from (0,0) to (-6,5).
That distance is equal to the radius of the circle.
{{{R^2=(-6-0)^2+(5-0)^2}}}
{{{R^2=36+25}}}
{{{R^2=61}}}
{{{R=sqrt(61)}}}
The diameter is twice the radius.
{{{D=2sqrt(61)}}}