Answer: 9 faces
Step-by-step explanation:
In geometry, we use Euler's formula, and it looks like this:
V − E + F = 2
where
V= the number of vertices of a polyhedron
E= the number of edges of a polyhedron
F= the number of faces of a polyhedron.
V = 9
E = 16
F = ?
V − E + F = 2
9 - 16 + F = 2
F = 2 + 16 - 9
F = 9
