[Solved] A connected planar graph having 6 vertices, 7 edges contains _____________ regions.

A connected planar graph having 6 vertices, 7 edges contains _____________ regions.

a) 15
b) 3
c) 1
d) 11

Answer: b
Explanation: By euler’s formula the relation between vertices(n), edges(q) and regions(r) is given by n-q+r=2.

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