It should be a 2-d shape, with 22 edges. It belongs to the family of polygon.
View page
3-d shaped is described by three co-ordinate system.
View page
2
View page
A pyramid
View page
To play happy birthday in numbers, on the recorder, it is D D E
D G F#, D D E D A G, D D D' B G F# E. This is equal to 3, 3, 2, 3,
4, 3, 2, 2, 3,1,3, 3, 3, 4, 3, 4, 3, 3, 4.