| Nominativ | quadriangulum, quadriangulus, quadriangula, quadriangula, quadriangulus, quadriangulum | quadrianguli, quadrianguli, quadriangula, quadriangula, quadriangulae, quadriangulae |
| Genitiv | quadrianguli, quadrianguli, quadrianguli, quadrianguli, quadriangulae, quadriangulae | quadriangulorum, quadriangulorum, quadriangulorum, quadriangularum, quadriangulorum, quadriangularum |
| Dativ | quadriangulo, quadriangulo, quadriangulo, quadriangulo, quadriangulae, quadriangulae | quadriangulis, quadriangulis |
| Akkusativ | quadriangulum, quadriangulum, quadriangulum, quadriangulum, quadriangulam, quadriangulam | quadriangulas, quadriangula, quadriangula, quadriangulos, quadriangulas, quadriangulos |
| Ablativ | quadriangula, quadriangula, quadriangulo, quadriangulo, quadriangulo, quadriangulo | quadriangulis, quadriangulis |
| Vokativ | quadriangule, quadriangulum, quadriangule, quadriangulum, quadriangula, quadriangula | quadrianguli, quadrianguli, quadriangula, quadriangula, quadriangulae, quadriangulae |
