Question

1. Use Euler’s Formula to find the missing number.

Faces: 23
Vertices: 10
Edges: ?

32
30
34
31

2.
Vertices: 14
Edges: 36
Faces: ?

24
25
23
27

Answer 1

Euler`s formula:
F + V - E = 2
1. F = 23, V = 10, E = ?
23 + 10 - E = 2
33 - E = 2
E = 31
2. V = 14, E = 36, F = ?
F + 14 - 36 = 2
F - 22 = 2
F = 24
Answers :
1. D )
2. A )