Question

In a solid if F=V=5,then the number of edges in this shape is?

Answer 1

Given : F=V=5

To Find : number of edges in this shape  

Solution:

Vertex V = 5

Faces  F = 5

Edges  E  = ?

Euler formula for faces

Faces  = Edges - Vertex + 2

F = E - V + 2

=> 5  = E - 5  + 2

=> 5 = E - 3

=> E = 8

number of edges in this shape is 8

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