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# vector algebra

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Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
1. By vector method,obtain the perpendicular distance of the point (5,5,5) from the line through the points (3,4,-1) and (1,3,1) ?
2. you need to find the intersection of the line through the points (3,4,-1) and (1,3,1) and the line perpendicular to it passing through ( 5, 5, 5 ).
3. (Original post by Udari)
By vector method,obtain the perpendicular distance of the point (5,5,5) from the line through the points (3,4,-1) and (1,3,1) ?
Drawing a diagram would help - doesn't need to be accurate. Then a quick method using the dot product may present itself.

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