Find k & m for Perpendicular Line to U, W & V Plane

In summary, the values of k and m must be equal to the components of the normal vector to the plane (9 and -29, respectively) in order for the line x+1/k = y-2/m = z+3/1 to be perpendicular to the plane through the given points.
  • #1
shawen
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find the values of k and m so that the line x+1/k = y-2/m = z+3/1 is perpendicilar to the plane through the points U(1,3,8) , W(0,1,1) , and v(4,2,0).PLEASE HELP ME
THANKS ALOT :)
 
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  • #2
shawen said:
find the values of k and m so that the line x+1/k = y-2/m = z+3/1 is perpendicilar to the plane through the points U(1,3,8) , W(0,1,1) , and v(4,2,0).PLEASE HELP ME
THANKS ALOT :)

The equation of the line shows that the line is parallel to the vector $<k, m,1>$. A normal to the plane is

$\vec{UW} \times \vec{WV} =\, <-1,-2,-7> \times <4,1,-1> =\, <9,-29,7>$.

For the line to be perpendicular to the plane, the normal $<9,-29,7>$ must be parallel to $<k, m, 1>$. So what does that tell you about $k$ and $m$?
 

FAQ: Find k & m for Perpendicular Line to U, W & V Plane

How do I find the values of k and m for a perpendicular line to a given plane?

The values of k and m can be found by using the normal vector of the given plane. The normal vector is a vector that is perpendicular to the plane. Once you have the normal vector, you can use the dot product to find the values of k and m. The dot product of the normal vector and the direction vector of the line must be equal to 0 for the line to be perpendicular to the plane. This will give you two equations with two unknowns (k and m), which can be solved to find their values.

How do I determine the direction vector of the perpendicular line?

The direction vector of the perpendicular line can be found by taking the cross product of the normal vector of the given plane and any other vector that lies in the plane. This will give you a vector that is perpendicular to both the normal vector and the vector in the plane. You can then use this vector as the direction vector for the perpendicular line.

Can I find multiple sets of values for k and m for a perpendicular line to a given plane?

Yes, you can find multiple sets of values for k and m for a perpendicular line to a given plane. This is because there are infinite lines that can be perpendicular to a plane. However, these lines will all have the same direction vector and will only differ in their values of k and m.

Can I use this method to find the perpendicular line to any plane in three-dimensional space?

Yes, this method can be used to find the perpendicular line to any plane in three-dimensional space. It is a general method that can be applied to any given plane, as long as you have the normal vector of the plane and a vector in the plane to use for the cross product.

How can I check if my values of k and m are correct?

You can check if your values of k and m are correct by plugging them into the equation of the line and checking if the resulting line is indeed perpendicular to the given plane. You can also check the dot product between the normal vector and the direction vector of the line to see if it is equal to 0, as this is a necessary condition for a line to be perpendicular to a plane.

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