A hexadecagon is a 16-sided polygon with 16 angles.
Petrie polygons
The regular hexadecagon is the Petrie polygon for many higher-dimensional polytopes, shown in these skew orthogonal projections, including:
| A15 |  15-simplex | |||||||
|---|---|---|---|---|---|---|---|---|
| B8 |  8-orthoplex |
 Rectified 8-orthoplex |
 Birectified 8-orthoplex |
 Trirectified 8-orthoplex |
 Trirectified 8-cube |
 Birectified 8-cube |
 Rectified 8-cube |
 8-cube |
| D9 |  t7(161) |
 t6(161) |
 t5(161) |
 t4(161) |
 t3(161) |
 t2(161) |
 t1(161) |
 9-demicube (161) |
| ||||||||||||||||||||
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