Don't know if it's already been given here but I found a trick to somehow make use of a measurement tool à la Photoshop.
Simply drag a line using Line tool set to First point and you get its length and angle in the Measurement palette. Then Apple-Z or Apple-K.
Hope this helps!
Jean-Marie Schwartz
> Mac Pro Quad Core Intel 2.8 GHz, OS X.6.8, Quark XPress 9.2, Adobe CS5 <