Question

Using Euler’s formula, find the unknowns.

Faces	Verticles	Edges
20	10	?

Answer 1

Euler’s formula is given by F + V – E = 2

F = 20, V = 10

By Euler’s formula = 20 + 10 – E = 2

30 – E = 2

E = 30 – 2

E = 28

Tabulating the required unknowns

Faces	Verticles	Edges
20	10	28