Use Euler's Formula to find the missing number.
Faces: 25
Vertices: 17
Edges: ?
Using Euler's Formula:
Faces + Vertices - Edges = 2
We can substitute the given values:
25 + 17 - Edges = 2
Simplifying:
42 - Edges = 2
Subtracting 42 from both sides:
-Edges = -40
Dividing both sides by -1:
Edges = 40
Therefore, the missing number is 40.