Mathematics
If in a polyhedron, number of faces = 12 and number of vertices is 20, then the number of edges is :
10
20
30
40
3D in 2D
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Answer
According to Euler's formula,
F + V - E = 2
Given: F = 12
V = 20
So,
⇒ 12 + 20 - E = 2
⇒ 32 - E = 2
⇒ E = 32 - 2
⇒ E = 30
The number of edges = 30.
Hence, option 3 is the correct option.
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