I am attempting to generate a polygon 'dartboard' shapefile. Radially, there should be a circle from 0 to 20 km, an annulus from 20 km to 30 km, and an annulus from 30 km to 80 km. These three concentric shapes are divided into 8 segments to yield 24 sectors.

Within ArcGIS Desktop , within a new shapefile, I have generated three overlapping circles, with the same origin. However, I do not know how to take these multiple features and convert them into a single feature set (e.g. separate outer ring, middle ring, and inner circle).

I have attempted to use the Overlay tools in ArcToolbox but to no effect.

Equally, I have no idea, once that is done, how to divide this shape up into 45 degree sectors.