Aaaahhhhh.......Finally....Something I love...
The answer is...
A trombone is considered a tenor voice of musical ensemble.
11 notes can go on a staff.
Treble Clef: D, E, F, G, A, B, C, D, E, F, G. (Re, mi, fa, sol, la, si (ti), do, re, mi, fa, sol)
Bass Clef: F, G, A, B, C, D, E, F, G, A, B. (Fa, sol, la, si (ti), do, re, mi, fa, sol, la, si (ti))
Hope this helps! :)
Two-Dimensional form (2D) is only length x width, it has no depth, like paper.
Three-dimensional form (3D) is length x width x height, like a cube.