I was wondering if there's any formula to calculate the number ofedgesandverticesof a polyhedrons? likeDodecahedron,Icosahedrons, (or generally for polyhedrons with a certain number of faces)

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- September 5th 2010, 08:42 PMzenith20Polyhedrons!?
I was wondering if there's any formula to calculate the number of

**edges**and**vertices**of a polyhedrons? like**Dodecahedron**,**Icosahedrons**, (or generally for polyhedrons with a certain number of faces) - September 5th 2010, 09:09 PMundefined
The number of faces is not enough to determine the number of edges and vertices. However, we have Euler's formula

Euler's Formula

Simple example I came up with on paper to illustrate how # faces does not uniquely determine # edges and # vertices.

1) square pyramid

2) a wedge you'd use to hold a door open

Both have five faces but number of edges and vertices are different. - September 6th 2010, 12:26 AMzenith20
Thanks for your help. so we need 2 of them at least! :)