If you take the slanted flange with the 33.0 distance. that gives you a distance for one leg of a right triangle. the next leg is 131.1 - 115.32= 15.78. Plug that into a calculator and you get an angle of 64.444 degrees.
If you take the slanted flange with the 33.0 distance. that gives you a distance for one leg of a right triangle. the next leg is 131.1 - 115.32= 15.78. Plug that into a calculator and you get an angle of 64.444 degrees.