[quote=Ellri]
Sep, What's a square mile radius?We know these two facts:square mile is a unit for area. The area covered by equal distances along two axes in a three-dimensional space.Radius is a straight-line distance along one axis in a 3-dimensional space.A square mile radius would either be nonsense, or involving the forth spatial dimension, which to most humans is nonsense, as most humans can't perceive it.
[/quote]

I could be very very wrong about this but I think a square mile radius is the area of a circle that intersects a square mile at the four corners. Something like this:

[img=https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcR0c4Gnw49xGs4fs4ZSBddHXDLC2bJs_vxmt94kCJtYVuykx6PGyL4MVtc]

Just remember I'm not a math wiz so this could easily be very wrong.