Finding Common perpendicular of two lines

[ydan87]

Hi there,
The two given lines:
1) x / 2 = (y-1) / 2 = z
2) x + 1 = y – 2 = (z + 4) / 2
I need to find the common perpendicular between them.
Though when I tried to calculate the distance between them, I get 0.

Can someone please help?

Thanks in advance

 

[sunjin09]

how do you find a vector that is perpendicular to two given vectors?

 

[ydan87]

Cross product...but how would I find the two vectors?

 

[sunjin09]

Cross product...but how would I find the two vectors?

pick any two points on the same line, what about their difference?

 

[LCKurtz]

This thread is a duplicate of https://www.physicsforums.com/showthread.php?t=588738. It is against forum rules to multi-post questions because it wastes our time.