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Euler's polyhedron formula
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Submitted by
Anonymous
on December 24, 2013
You might find this interesting:
https://www.awesomemath.org/assets/PDFs/MR4_planar_graphs.pdf
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## You might find this

You might find this interesting:

https://www.awesomemath.org/assets/PDFs/MR4_planar_graphs.pdf