Question 389041
Use the distance formula,
{{{D^2=(x[2]-x[1])^2+(y[2]-y[1])^2}}}
{{{D^2=(3-5)^2+(3-5)^2}}}
{{{D^2=4+4}}}
{{{D^2=8}}}
{{{D=sqrt(8)}}}
{{{highlight(D=2*sqrt(2))}}}