Question 1204687
{{{drawing ( 600, 600, -10, 10, -10, 10,
green(line(2,-2,2,6)),green(line(2,-2,6,-2)),
green(line(6,-2,2,6)),
locate(2,6.5,Dylan),locate(6,-2.5,Connor),locate(2,-2.5,school),
locate(1.5,2,8km),locate(4,3,10km),locate(4,-2,d),
graph( 600, 600, -10, 10, -10, 10, 0)) }}}

{{{d^2=10^2-8^2}}}
{{{d=sqrt(100-64)}}}

{{{d=sqrt(36)}}}

{{{d=6km}}}