A pipe can be cut to fit angled flat sheet at each end using the Pipe Mitered Both Ends wizard.
Top Miter Angle specifies the angle of a flat cutout through the top end of the pipe.
Spin Top Angle allows the cutout to be rotated around the center line of the cylinder.
Neutral Axis Fraction should be set to 0.5 if developing the pipe from flat plate otherwise 0.0 if cutting pipe.
Dev. Segs the number of segments around the diameter that the pipe will be broken up into.
Development Start Angle the point on the unrolled cylinder that will match up with the edge to be joined on the flat plate.
Show bends When viewing the flat plate development view the bend line of each segment.