Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.


Ed Wall
Posts:
845
Registered:
12/3/04


Re: Distance formula
Posted:
Apr 4, 2005 11:29 AM


How are you using the distance formula for finding the distance between a point and a line?
Ed Wall
At 12:39 PM +0000 4/4/05, Moriel wrote: >I know how to use the distance formula most of the time, for finding >the distance between a point and a line, but there are certain >instances where I get stuck. For example: here's the problem I'm >trying to do right now. "Find the distance from the point (4, 1) to >the line x + y = 5." Okay, that's not hard, but what I end up with >for two equations are y = x + 5 and then y = 1/x  5/4, which would >be okay again, but when I set those equal to each other I have x + >5 = 1/x  5/4, and the stupid problem is I don't know how to add x >and 1/x. If it were anything elsex and 1/2x, or whateverI'd be >fine, but I keep getting stuck on this. > >Thanks!



