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anonymous
 5 years ago
Hello! Here is my question:
I have in space a line AB where A (0,0,0) and
B (3,5,10). I have a point C (4,7,9). I need to find on line AB a point D where the line CD intersects AB if this lines are perpendicular to each other. Please show step by step. Thanks.
anonymous
 5 years ago
Hello! Here is my question: I have in space a line AB where A (0,0,0) and B (3,5,10). I have a point C (4,7,9). I need to find on line AB a point D where the line CD intersects AB if this lines are perpendicular to each other. Please show step by step. Thanks.

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amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0you need to determine if the lines even intersect

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Very good. Now call D, xyz and find CD

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0<3,5,10> <x, y, z>  3x +5y +10z = 0

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.03(x4t) +5(y7t) +10(z9t) = 0 right?

toxicsugar22
 5 years ago
Best ResponseYou've already chosen the best response.0chaguanas can u help me with a math question

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0x = 3t y = 5t z = 10t is the equation of one line in space

toxicsugar22
 5 years ago
Best ResponseYou've already chosen the best response.0amistre can u help me

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0x = x0+4t y = y0+7t z = z0+9t is the other.... i think

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0i can look at it, not sure if i can helptho :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I do not remember how to find th Perpendicular

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0To find perpendicular is to find the normal, cross two vectors.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Yes, Amistre, found AB and CD. Actually, you just test them to see if they are perpendicular.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Yes, if you dot them and get 0, they are perpendicular

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I will try. How do I find the normal, cross two vectors?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Yes that is how you found the normal. But in this case by the way the question was asked you were led to the answer to your question without having to do that.
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