The trigono (Greek: τρίγωνο) is a kind of a Greek auxiliary percussion instrument with three angles. Trigono means triangle in Greek (τρίγωνο < τρία [three] + γωνία [angle]). It is made from steel. The trigono in Greek tradition is also used by the kids in Greece that are singing the carols. Similar names: kampanaki ("καμπανάκι"), simantron ("σήμαντρο"), skara ("σκάρα") or simantiri ( "σημαντήρι").