| Nominativ | platea | plateae |
| Genitiv | plateae, plateai | plateum, platearum, platearumque |
| Dativ | plateae, plateai | plateabus, plateis, plataeis |
| Akkusativ | plateam | plateasque, plataeas, plateas |
| Ablativ | platea, platead | plateabus, plateis, plataeis |
| Vokativ | platea | plateae |
