This math fractions ClipArt gallery offers 5 illustrations of a five sided polygon broken into fifth slices. This includes images of individual slices, as well as the polygon with missing slices.
1/5 of a 5 sided polygon
2/5 of a 5 sided polygon
3/5 of a 5 sided polygon
4/5 of a 5 sided polygon
5/5 of a 5 sided polygon