I've searched everywhere on rules for this and cant find anything, basically it boils down like this
Im a wizard flying 30ft. in the air and a ranger 15ft. away from the square I'm flying over wants to shoot me.
What would be the distance for him to shoot (for range penalties and what not) and how do you determine distance in three dimensions like that.
some help on this or rules references would be very helpfull
a friend referenced the pythagorean theorem but if you use that the book should have something about it