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