Hi, i'm folding coelophysis by Satoshi Kamiya, i have already fold this model before, but in step 44 i don't know how to make the angle trisector. The first time i folded i made it just guessing the place of the fold, but this time i want to make something more precise!!!
I've done that coelophysis twice and I always trisected the angles approximatively since there isn't really a trick to do it. But, if you want to be as more precise as possible, measure the angle with an instrument (whose name escapes me at the moment), divide that length by 3 and make your marks at each third. Then, fold along the corner and the marks. That should do the trick.