proof for perpendicular distance formula (2 Viewers)

[nonsenseTM]

http://en.wikipedia.org/wiki/Perpendicular_distance

how do you prove it?
btw, how do you guys type things like that "picture" of the formula?

 

[Mudkip94]

http://en.wikipedia.org/wiki/Perpendicular_distance

lol fail

if the picture is local then u hav to either upload it to the interwebz and embed it or upload it as an attachment

 

[Shadowdude]

"Launch LaTeX Equation Editor" button for typing maths stuff.



I don't know how to prove it. Maybe something to do with Pythagoras.

 

[jet]

It isn't that hard to find.

http://tinyurl.com/y8jlrkz
http://www.intmath.com/Plane-analytic-geometry/Perpendicular-distance-point-line.php

 

[nonsenseTM]

could some one explain it for me pls?

 

[bob fossil]

could some one explain it for me pls?

Dont you just use M1 x M2 =-1


Where M1 is the gradient of the first line
And M2 is the gradient of the second.

 

[bob fossil]

Dont you just use M1 x M2 =-1


Where M1 is the gradient of the first line
And M2 is the gradient of the second.

Sorry didn't read what was being asked.


Break it down into smaller parts eg taking the midpoint and workin from there

 

[Mudkip94]

Sorry didn't read what was being asked.

Break it down into smaller parts eg taking the midpoint and workin from there

Umm... huh? That doesn't work...

 

[Mudkip94]

Sorry for the crappy mobile phone pic.