Triangle (instrument) facts for kids
The player holds a small piece of string or leather from which the triangle is hanging, and he makes a sound by hitting the triangle with a metal beater. In orchestras, where the percussionist may be playing several percussion instruments, the triangle may hang from a stand so that the player can move quickly to another instrument.
Triangles come in different sizes. Smaller ones will sound higher than larger ones.
Triangle (instrument) Facts for Kids. Kiddle Encyclopedia.