Source to load matching, the object is to calculate real and imaginary voltages & currents to achieve a resistive load on the source signal generator .
I’m not sure but I think it’s not a very good way to compare things either since they’re all different angles! and it naturally draws attention to the area of the shape it makes even though that’s super misleading!
I can think of a few use cases where I haven't hated them (mostly stat spreads in video games) but examining that thought I realize I may well just be used to it and a pie chart would potentially work just as well