Find number of edges in a polyhedron which have 9 vertices and 9 faces – InterviewSolution

1.

Find number of edges in a polyhedron which have 9 vertices and 9 faces.

Answer»

Number of vertices (V) = 9
Number of faces (F) = 9
To Find : Number of edges.

Euler’s formula :

V + F = E + 2
Then, 9 + 9 = E + 2
or 9 + 9 – 2 = E
Hence, E = 16

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