Question

Use Euler's formula to find the missing number.

Faces:
Edges:15
Vertices:9

Answer 1

So we are talking about Eulers formula for planar graphs. Which states that for a planar graph we have \[v-e+f=2\]

So in this situation \(9-15+f=2\). Solve for \(f\).

Answer 2

F = 2 - V + E

Answer 3

8 is the answer as i think

Answer 4

Thank you @rhr12

Answer 5

You are most welcome