If a polyhedron has 6 vertices and 9 edges, then it has ___ faces.

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Solution

The correct option is B
5

F=?, V=6, E=9
Using Euler's formula we have

$F + V - E = 2$

$F + 6 - 9 = 2$

$F - 3 = 2$

$F = 5$

Hence (B)

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