Because it is
guimbal
It is a string instrument.
The correct spelling is percussion (drums or small explosives).
Piano is a percussion instrument as every thing about it is percussive. It is non contact (you dont actually touch the strings in conventional piano playing which are the source of the sound) and the strings are hit with hammers which are like mallets to the marimba or vibes. People may think it is a string intrument because the sound is from a string and it would be if the string were plucked or bowed. The piano sounds more like a percusion instrument as well if you compare it to a marimba/vibes/xylophone... and then to a cello or violin,
oo dahil ito ay tumutugtog ng mababang tono
The humble triangle rightly belongs to the percussion section.
You have a lot of Philippine percussion. some of them are the Dabakan, The Gong, The Kulintang, Agung, Kagul Libbit, Gambal, Sulibao,Babandil, and etc.
The sound in a piano is made via a sieries of strings so that would cause people to belive it is a string instrument, however the strings are not plucked of played with a bow they are hit with hammers, so therefore they are PRECUSSION.
le piano I play the piano = Je joue du piano
Piano Jouer du piano - to play piano
piano.
forte,piano,forte,piano,forte,piano,forte,piano,forte,piano,forte