The triangle is an idiophone type of musical instrument in the percussion family. It is a bar of metal, usually steel but sometimes other metals like beryllium copper, bent into a triangle shape.

The triangle is a small instrument made of a metal rod bent into a triangle shape that is open at one corner. While small, its sound is distinct, with multiple overtones and nonharmonic resonance.

It's unlike any other percussion instrument technique, and it will be really obvious to the audience if there are hiccups and gaps in that clangy metal noise. 13. Practice your soft playing.