vertical is a straight line up...Ok thanks I've got it.
In Chinese we say "vertical" and "perpendicular" in a single word. That may be the reason which caused my puzzlement. :wink:
Hi~! i'm new here from HK...
The words "perpendicular" and "vertical" have different meanings in Cantonese.. and i believe that the meaning in english is also different...
To my poor knowledge..
i regard perpendicular as two objects(eg. 2 lines or 2 planes) meet teach other forming 90 degrees angles..
and i regard vertical as an object which is perpendicular to the horizontal.... vertical is a universal word, this word always regard the ground(or x-axis) as base...
am i correct?
To Euler
I like the word orthogonal instead of perpendicular. It roughly means the same thing and usually requires a definition for the uninitiated
Wouldn't a plane perpendicular to the vertical be parallel to the horizon? That is if your in Kansas.
Rap
rap,
my explanation does not violate your hypothesis...
vertical IS perpendicular to the horizon....
and the plane you mentioned is flying horizontally perpendicular to the vertical....
am i correct in interpreting your hypothesis?
