Question

1. Find the number of vertices in a polyhedron having 9 faces and 21 edges.
a) 18
b) 14
c)22
d) 16​

Answer 1

Answer:

14 edge

Step-by-step explanation:

According to Euler's formula

_________________________

$f + v = e + 2$

F= Face

V= vertices

E= edge

ATQ (According to the question)

-------

$9 + v = 21 + 2$

$9 + v = 23$

$v = 23 - 9$

$v = 14$

Answer v=14

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