Coins
| Bermuda, 1 Dollar, 1997 |
| Reuleaux Triangle |
| Swaziland, 2 Cent, 1974 |
| 4 sided |
| India, 3 Praise, 1964 |
| 6 sided |
| Great Britian, 50 Pence, 1969 |
| 7 sided |
| Chile, 5 Pesos, 1996 |
| 8 sided |
| Thailand, 5 Bahit, 1972 |
| 9 sided |
| Fiji, 50 Cents, 1987 |
| 12 sided |
While most coins are circular and most currency is rectangular, there are exceptions. Most common are regular polygons with rounded corners, though other more unusual shapes have also been used.
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