A pie of pie or bar of pie: a pie of the series' points but those split off it, whose slice for them (Excel's "Other") faces a second pie or a bar of them. It draws its first series only.
The bar, of a bar of pie: its box, in px.
The first pie's center and radius, in px.
What the second plot is.
The second pie, of a pie of pie.
Optional
The two lines from the ends of the Other slice to the second plot.
A pie of pie or bar of pie: a pie of the series' points but those split off it, whose slice for them (Excel's "Other") faces a second pie or a bar of them. It draws its first series only.