Question

7. Using Euler's formula, find the values of a, b, c and d.
Faces
a
5
20
Vertices
6
b
12
d
Edges
12
9
C
​

Answer 1

Answer:

Using Euler's formula, find the values of a, b, c and d. Faces, a, 5, 20, 6. Vertices, 6, b, 12, d. Edges, 12 , 9, c ... 14 – 6 = 8. (ii) b + 5 – 9 = 2 ⇒ 6 = 2 + 9 – 5 = 6. (iii) 20 + 12 – c = 2 ⇒32 – c = 2 ⇒ c ...