Question

A polyhedron has 7 vertices and 13 edges. How many faces does it have?
Answer
A.
6
B.
7
C.
8
D.
9

Answer 1

\[F + V - E = 2\]

Answer 2

Use Euler's formula F - E + V = 2, where F is the number of faces, E is the number of edges, and V is the number of vertices of the polyhedron:

F - E + V = 2

Answer 3

V = 7
E = 13

Answer 4

what?

Answer 5

F - 13 + 7 = 2

Answer 6

8

Answer 7

yes

Answer 8

thanks