How to calculate angles for molding?
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We replaced our bathroom ceiling, and before I could tell my husband to save the molding to copy the angels, he already destroyed it when he took it down. How would I calculate the angels and cut the molding for a slanted ceiling?
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Easy! You can purchase an inexpensive mitre box.
https://www.doityourself.com/stry/how-to-cut-crown-molding-with-a-miter-box
https://www.blocklayer.com/crown-molding.aspx
https://www.lowes.com/cd_How+to+Cut+Crown+Molding+Miter+Bevel+and+Angle_711801992_
https://www.youtube.com/watch?v=LHUH7knryFc
We are all presuming that you meant angles. as in 45 degree angles, and not angels, celestial beings, as you wrote. If so then a miter box & saw is the only way to go to get the angles to match after you cut them unless you want to go with a power miter saw which will give you more accurate cuts, the down side is that they aren't cheap by any standards.
Most crown molding is going to have to be cut flat on the table. The angles are going to be 52 degrees on the angle, and 38 degrees on the bevel. For your corners, you are going to want to cope them instead of trying to fit these angles. Coping is the proper way of installing any type of trim (crown mold, base, shoe molding, cherry rail etc.)