Question

a polyhedron has 9 vertices,9 faces. how many edges does the polyhedron have?
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Answer 1

Answer:

16 edges are in polyhedron

Answer 2

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