I have an approx. degree of slant of 42.5* in my attic bedroom. Lets call it 45* .
If I use my formula that came with the stile/rail set, I can cut perfectly fitting door frames.
My problem: How do I cut a door frame that has a 45* angle, and is only 3 pieces for the door frame.
How do I know what length to cut the pieces on the angle?
is there a mathematical formula that takes the width of the piece, the length I need and the angle?
the door, as well as the face frame, is going to look like a carpenters triangle. I can figure out the hinge stile side, and the bottom rail side, but how do I figure out the length of the long rail side.(Im calling it a rail because it will have a tenon on each side)