rounder
There are infinitely many of them. Most do not have names.
the Romans
4
There are no specific geometric names since all shapes can be rotated so that the top becomes the right and so on.
They are said to be congruent or similar.
flut
banjo
drums
rounder
Here are some names of musical instruments:drums (percussion)trianglebellsguitarelectric guitarpianoorganflutesaxophoneviolinclarinet
euphonium
lyres