Common crown molding spring angles are 38, 45 and 52 degrees. ... Since the molding rests on an angle against the table and fence of your miter saw, ... For a 90-degree corner, set your saw to 45 ...

This will give you the proper 45-degree angles on the mating edges of the two pieces in the corners. Before you ruin much more of your expensive crown molding, and your mental health, cut two 1 ...

Picture frames and boxes require joining two boards to create a right angle. The cleanest way to do that is cutting 45 degree angles at the end of each board, called a miter cut.