Sorry as this is a rather soft question, but I'm really struggling to get to grips with some packages for this (espcially since I really don't care about learning all the in's and out's). I literally just want the Petersen graph, $C_3$ and $C_6$. The problem with finding the pictures online is that the graphs will look inconsistent (different sizes of nodes etc from different webpages).
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tikz. – Bernard Jun 22 '14 at 16:28