Posted by Anonymous on Sunday, February 3, 2013 at 11:21am.
A(8,-19,10) is a point on the first line and
B(15,29,5) is a point on the second line
vector AB = (7,48,-5)
the second line has direction v = (3,8,-5)
so the projection of vectorAB on u = AB·v/|v|
= (21 + 384 + 25)/√(9 + 64 + 25) = 430/√98
= 430/(4√2)
|AB| = √(49 + 2304 + 25) = √2378
so we can use Pythagoras
let the distance between the lines be h
h^2 + (430/√98)^2 = (√2378)^2
h^2+ 184900/98 = 2378
h^2 = 48144/98 = 24072/49
h = √24072 /7 = 2√6018 /7 = appr 22.1645
better check my arithmetic on that one, easy to make typing errors.
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