I have some external corners to drywall but they are not 90

[Owen111]

Hi
I'm doing a small job that no local builders will take on as it is too small. I need to dry plasterboard the inside of a conservatory wall, the inside joints are well documented using paper tape but the external ones (the reveals around the doors) have me baffled. They are not 90 decrees so I cannot use the normal beading, can I?
Advice would be gratefully accepted.

 

[Alastairreid]

http://www.british-gypsum.com/products/gyproc-corner-tape

 

[Owen111]

The Gyproc tape is exactly what I was looking for. Thanks for the advice, most appreciated.