DP Further Mathematics HL Questionbank
Euler’s relation: \(v - e + f = 2\) ; theorems for planar graphs including \(e \leqslant 3v - 6\) , \(e \leqslant 2v - 4\) , leading to the results that \({\kappa _5}\) and \({\kappa _{3,3}}\) are not planar.
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