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5 items are filed under this topic.
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The distance from a point to a line in 3 space |
2006-10-29 |
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From Marie:
find the distance from the point (1, -2, -3) to the line x = y = z-2
Answered by Penny Nom. |
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Vectors in three space |
2004-10-30 |
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From Jo:
I have two questions that I just cannot visulise and dont know how to get started on them..!
1. Ship X is sailing North at 4m/s and Ship Y is sailing due East at 3m/s. A sailor on Ship X climbs a vertical pole at 1/2 m/s. What is the velocity of the sailor on Ship X relative to an observer on Ship Y? State it's magnitude and direction.
Not sure where to start with this one...
2. Show, using vectors, that for any tetrahedron, the segments joining the midpoints of the opposite edges are concurrent.
i know what a tetradedron is, and what I am proving but do I solve simultaneously for a specific case??
Answered by Walter Whiteley. |
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Distance in 3-space |
2002-08-16 |
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From David:
The question is: how do I figure out the distance of one object in 3D space to another object in 3D space? I have an object at say x = 5.872, y = 2.876, and z = 7.290; and the other object is at x = 1.129, y = -8.213, and z = -11.127. I have been suggested to use the pythagorean theory on this, but since there are three variables, I don't understand how.
Answered by Penny Nom. |
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A cone in 3 space |
2002-03-20 |
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From Matthew:
Let C in R3 be the cone defined by x2 + y2 - z2 = 0 (A) Let P be the plane described by x + 2z = 1 (i) Find a description of P in terms of two parameters s and t .
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Answered by Walter Whiteley. |
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A line in 3 dimensions |
2001-10-17 |
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From Murray:
I'm working on a complicated proof and i need the equation for a line in 3 dimensions.
Answered by Claude Tardif. |
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