Space geometry basics

[robenson]

Hi guys, newbie here

I am trying to find out how to use my ti 89 tit as a spacial geometry cas. We have been presented with our standard 2 lines in space and we need to calculate if the are parallel etc etc. So with our standard A(a1,a2,a3)+t(x,y,z) and B(b1,b2,b3)+(x,y,z) coordinates, how do I graphically see this int the Ti 89?

Hope I'm making sence, I'm quite new at this

Thanks
R