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