Distance between Point & Plane in Vector Calculus

In summary, the conversation discusses finding the distance between a point and a plane, using parametrics and cross products. The topic also shifts to finding a vector and a line perpendicular to the plane, using the plane equation and the normal of the plane. There is a question about the relevance of this conversation to vector calculus.
  • #1
fanizza2
1
0
I have a point in (x,y,z) and a plane in the form Ax+By+Cz=D and I need to find the distance between the point and the plane. I tried using parametrics and cross products, but I couldn't figure it out. Thanks
 
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  • #2
Can you find a vector that is perpendicular to the plane?
Once you have that, can you find a line that is perpendicular to the plane, and goes through the point?
 
  • #3
the plane equation N.P-D=0 may be more usefull to you where N is the normal of the play. and D=N.P0, p0 a point given on the plane. Think how you'd get N from the equation you gave.
 
  • #4
how exactly is this a vector calculus tutorial?
 

FAQ: Distance between Point & Plane in Vector Calculus

What is the formula for calculating the distance between a point and a plane?

The formula for calculating the distance between a point and a plane in vector calculus is given by:
d = |ax0 + by0 + cz0 + d| / √(a² + b² + c²), where (x0, y0, z0) is the coordinates of the point and ax + by + cz + d = 0 is the equation of the plane.

How do you find the coordinates of the point on the plane closest to a given point?

To find the coordinates of the point on the plane closest to a given point, first calculate the distance between the given point and the plane using the formula d = |ax0 + by0 + cz0 + d| / √(a² + b² + c²). Then, substitute this distance into the equation of the plane to solve for the coordinates of the closest point.

Can the distance between a point and a plane be negative?

No, the distance between a point and a plane cannot be negative. Distance is a measure of length and is always positive.

What is the significance of the absolute value in the distance formula for a point and plane?

The absolute value in the distance formula ensures that the result is always positive, as distance is a measure of length and cannot be negative. It also accounts for the possibility of the point being on the opposite side of the plane from its normal vector.

Can the distance between a point and a plane be zero?

Yes, the distance between a point and a plane can be zero if the given point lies on the plane. In this case, the point is said to be coplanar with the plane.

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