| Singular | Plural | |
|---|---|---|
| Nominativ | trigon, trigoneis, trigon, trigonalis | trigones, trigones |
| Genitiv | trigonis, trigonis | trigonium, trigonium, trigonum, trigonum |
| Dativ | trigone, trigoni, trigoni | trigonibus, trigonibus |
| Akkusativ | trigonem, triconem | trigones, trigones |
| Ablativ | trigone, trigone | trigonibus, trigonibus |
| Vokativ | trigonalis, trigon, trigoneis, trigon | trigones, trigones |