What kind of 3d shape has 17 faces?
These are very hard to spell but here you go:
17 faces: septadecahedron
18 faces: octadecahedron
19 faces: nonadecahedron
20 faces: icosahedron
21 faces: unicosahedron
22 faces: dicosahedron
29 faces: nonicosahedron
30 faces: tricontahedron