my strategy for angle ranking as always been, if they are all 90 or below (acute) check out which one comes close to 90 degrees, like imagine a right triangle, usually if you like step bac from the computer screen and take a good look and draw a 90 degree line on one of the angles and compare that with another close one you can see the difference...practice it
But to answer your question i dont think they can have 1 degree difference its pretty hard to see...