Okay our saw guy doesn't seem to know how to do a thing so I'm just gonna ask all y'all because I can't tell if my intuition is different because I'm a welder or not:
I give you (2) plates of metal and tell you I need them cut to form a 45⁰ bevel
How would you prepare these plates (ie what angle would you cut them at)?
@Lady Always good to double check but your first instinct is correct