meauring the angle of a sloping line

[Donal Hanafin]

hello there everyone,
I’m trying to finding the angle of a sloping line that I have in illustrator v10, is there any completely accurate way to find out what angle it is, I can use the measurement tool but I can’t click directly on the points I can only make a guess as to whether or not I’ve got it parallel or not. I could use trigonometry equations to do it but I’m hoping there’s an easier way to do this. Any help would be much appreciated.

Thanks a mil
Donal