Question 45349
{{{radius(d) = sqrt((x2 - x1)^2 + (y2 - y1)^2)}}}
{{{d = sqrt((4 - 0)^2 + (7 - 0)^2)}}}
{{{d = sqrt(16 + 49)}}}
{{{d = sqrt(65)}}}
{{{x^2 + y^2 = 65}}}
{{{ graph( 600, 600, -10, 10, -10, 10, (65 - x^2)^(1/2), -(65 - x^2)^(1/2) ) }}}