Sides must be parallel and equal in length.
I really could do with some help on 9.b
apolygise is image/link doesn't work, am posting this at school and imageshack is filtered, so I can't check...
Yes, C=5, and now we have point N part c should be very simple, thank you for your help!
I kept trying to have ON and MN dotted = to zero to create simultaneous equations, with equations for the line MN's length equalling the length of OL.
It failed quite superbly, I greatly over complicated matters, would have been useful to know how many marks this question was.