Maybe you would have to experiment using 'sides' of the polyhedron's faces, the way she did here, in proving no polyhedron has seven edges:

http://plus.maths.org/content/os/issue43/features/kirk/proof

but as I could barely follow *that* one, that's all the 'help' I can offer :)

## until abi answers...

Maybe you would have to experiment using 'sides' of the polyhedron's faces, the way she did here, in proving no polyhedron has seven edges:

http://plus.maths.org/content/os/issue43/features/kirk/proof

but as I could barely follow *that* one, that's all the 'help' I can offer :)