Question

Find the number of edges in a polyhedron which has 9 vertices and 9 faces. Also name the solid.​

Answer 1

Step-by-step explanation:

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

and the no of edges is 16