The easy way to picture it is with a 45 degree triangle like they do on that laser range finder commercial,only if I figurad what they said on that commercial right the stand has to be 90 ft high for it to work out.
Assuming your stand is on level ground the differance would be 2.4yards which will make a differance when shooting down at the side of a game animal because the closer they are the narrower the area of the kill zone.
For those reasons I try to set up my shots for at least 15 yards minimum and hopefully 25 max. LEE