Can any shed some light on the "Support Ring" output obtained from Plop?

I'm just tinkering with some cell figures and am looking at an 18 point
cell. This requires that the mirror is divided into 12 portions on an outer
support ring and 6 on the inner ring. My question is how do I interpret the
radius and angle figures that Plop give into something I can draw on a piece
of paper?

For example I get...
Ring 1
Num of points = 6
Radius = 0.399586
Angle = 0

Ring 2
Num of points = 12
Radius = 0.834338
Angle = 15

I just want to know how I might divide my circle up for positioning of the
various triangle supports and bars.

Cheers
Andy