work triangle over surgery patient?  

As is so often the case on these forums, someone has asked "Why is [thing]?" without asking "Is [thing]?"

I know, why wouldn't hospitals want odd shaped rooms? Makes no sense. I quit.

Because funky looking angles are the least important consideration when trying to get a patient with a gunshot wound into surgery.  

You mean building materials, furniture, equipment, etc. don't customarily come in sixty degree angles?  I learn something new every day.

Triangular plans often yield multiple rooms with acute angles, at least at ends and corners.  Hospital rooms (ideally) should be compact and efficient yet still provide good access and movement inside.  Tough to do in pointy rooms.

of course, because hospital is one of most functional buildings in archi. types . i think that it my occur in odd case and will be cured after that