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# Vectors - Planes watch

1. The last part usually the plane is given in Cartesian form and you can just sub the equation of the line into the equation of the plane and find lambda.

In the mark scheme it says the plane x -z is the plane y=0 but I don't get how it is this?
2. (Original post by khanpatel321)

The last part usually the plane is given in Cartesian form and you can just sub the equation of the line into the equation of the plane and find lambda.

In the mark scheme it says the plane x -z is the plane y=0 but I don't get how it is this?
think of a two D Cartesian line analogy
3. (Original post by khanpatel321)

The last part usually the plane is given in Cartesian form and you can just sub the equation of the line into the equation of the plane and find lambda.

In the mark scheme it says the plane x -z is the plane y=0 but I don't get how it is this?
The x-z plane is exactly the same as the y=0 plane.
4. (Original post by B_9710)
The x-z plane is exactly the same as the y=0 plane.
Yeah, but I don't understand why
5. (Original post by khanpatel321)
Yeah, but I don't understand why
For all points in the X-z plane, y=0

Posted from TSR Mobile
6. (Original post by TeeEm)
think of a two D Cartesian line analogy
(Original post by khanpatel321)
Yeah, but I don't understand why
(Original post by drandy76)
For all value of the X-z plane, y=0

Posted from TSR Mobile
Ohh, so does that mean the plane x +z is also the plane y= 0 ?

and the plane y +z is the plane x=0
7. (Original post by khanpatel321)
Yeah, but I don't understand why
Think about it this way. The z=0 plane is the x-y plane which makes sense because when you think about the x-y plane in 2D, you don't ever consider the Z coordinates because the Z coordinate for any point in the x-y plane is 0.
8. (Original post by khanpatel321)
Ohh, so does that mean the plane x +z is also the plane y= 0 ?

and the plane y +z is the plane x=0
the x - y plane is z = 0
the x - z plane is y = 0
the y - z plane is x = 0
9. (Original post by TeeEm)
the x - y plane is z = 0
the x - z plane is y = 0
the y - z plane is x = 0
(Original post by B_9710)
Think about it this way. The z=0 plane is the x-y plane which makes sense because when you think about the x-y plane in 2D, you don't ever consider the Z coordinates because the Z coordinate for any point in the x-y plane is 0.
(Original post by drandy76)
For all points in the X-z plane, y=0

Posted from TSR Mobile
Ok thanks guys
10. it looks like "the x minus z plane"
11. (Original post by khanpatel321)
Ohh, so does that mean the plane x +z is also the plane y= 0 ?

and the plane y +z is the plane x=0
It's not the x minus z plane or x plus z plane. It's the xy plane or xz plane. Yu don't say x minus y plane. You just say xy.

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