Question

For the polyhedron, use Euler's Formula to find the missing number.

faces
edges: 8
vertices: 5​

Answer 1

5 faces

Explanation:

Euler's formula for polyhedra states that

F + V - E = 2 ( F is faces, V is vertices and E is edges ), thus

F + 5 - 8 = 2, that is

F - 3 = 2 ( add 3 to both sides )

F = 5

Thus number of faces is 5