Instrument of rock! RAWWW!!! *ting ting ting tingtingting ting*
http://i175.photobucket.com/albums/w...triangle_1.jpg
Actually you could do it.
If you like hung the triangle in a metal circle that had a pickup on it and it was insulated.
Just like you can make a guitar with a wire, a plank, a small block of wood, a pickup, nails, hammer, and a glass bottle