pipe miter

[Maryak]

I think you've complcated the whole thing by introducing the second angle (rise), after look ing at your shoebox projection, isn't all you have to do is make a simple 144° bend and tilt the whole issue upwards?

You took the words right out of my mouth. ;D

Best Regards
Bob

 

[mklotz]

Exactly.

If you take a piece of wire and put a single bend in it, it's always possible to find a plane that passes through both wire segments. Therefore, the part shown is a planar figure and all that matters is calculating the angle of the bend between the two segments.