This math fractions ClipArt gallery offers 13 illustrations of a twelve sided polygon broken into twelfth slices. This includes images of individual slices, as well as the polygon with missing slices.
1/12 of a 12 sided polygon
2/12 of a 12 sided polygon
3/12 of a 12 sided polygon
4/12 of a 12 sided polygon
5/12 of a 12 sided polygon
6/12 of a 12 sided polygon
7/12 of a 12 sided polygon
8/12 of a 12 sided polygon
9/12 of a 12 sided polygon
10/12 of a 12 sided polygon
11/12 of a 12 sided polygon
12/12 of a 12 sided polygon
12/12 of a 12 sided polygon with one piece detached