Question 198044
He basically only goes 2 directions, north and west and 10 blocks each.

Simple Pythag Ther.

{{{a^2+b^2=c^2}}} where a=10 and b=10
{{{(10)^2+(10)^2=c^2}}}
{{{100+100=c^2}}}
{{{200=c^2}}}
{{{c=sqrt(200)=10sqrt(2)=14.142135623730950488016887242097blocks}}}