Slope of a plane

  • #1

Main Question or Discussion Point

Suppose that there's a flat 3-d plane with points A,B,C,D. The midpoint is X. How do I find the equations for each of the points if the plane is slightly warped (meaning, that its sort slightly of bent). If I were to find the slopes on each side of the plane, would it matter that it's slightly warped?

Thnx
 

Answers and Replies

  • #2
rachmaninoff
What do you mean by 'warped'? If it's not flat then it's not a mathematical plane, and using plane formulas will give you at best approximations.

The general equation for planes is ax + by + cz = d; if it's not a purely vertical plane then you can express z as a function of x and y, z(x , y) = ux + vy + w, with u = - a/c, v = - b/c, w = d/c.

edit: A question, are you talking about an infinite (unbounded) plane, or a quadrilateral with corners A,B,C,D?
 
Last edited by a moderator:
  • #3
rachmaninoff said:
What do you mean by 'warped'? If it's not flat then it's not a mathematical plane, and using plane formulas will give you at best approximations.

The general equation for planes is ax + by + cz = d; if it's not a purely vertical plane then you can express z as a function of x and y, z(x , y) = ux + vy + w, with u = - a/c, v = - b/c, w = d/c.

edit: A question, are you talking about an infinite (unbounded) plane, or a quadrilateral with corners A,B,C,D?
Just a 3d rectangular shaped object with sides A,B,C,D. Warped meaning that when you take a rectangular piece of paper and if you slightly bent the sides at the long ends of the paper, one corner will be higher than its opposite side, up and down.
 
  • #4
HallsofIvy
Science Advisor
Homework Helper
41,833
955
Then it is not a "flat plane"! Without being given more information about exactly how it is warped, there is no way to calculate anything.
 

Related Threads on Slope of a plane

  • Last Post
Replies
3
Views
5K
Replies
16
Views
3K
  • Last Post
Replies
4
Views
4K
Replies
35
Views
6K
  • Last Post
Replies
6
Views
5K
  • Last Post
Replies
14
Views
3K
  • Last Post
Replies
16
Views
1K
  • Last Post
Replies
2
Views
4K
  • Last Post
Replies
3
Views
849
  • Last Post
Replies
21
Views
1K
Top