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Mathematics 11 Online
OpenStudy (anonymous):

What are the formulas for finding sides, vertices, and faces on a prism?

OpenStudy (anonymous):

V-E+F=2

OpenStudy (anonymous):

here is a bunch of proofs http://www.ics.uci.edu/~eppstein/junkyard/euler/

OpenStudy (anonymous):

SO if I know a pyramid has 4 base edges and 4 faces... it would be V - 4 + 4 =2 ?

OpenStudy (anonymous):

you mean a triangular based pyramid or a square based? like this? |dw:1334961839776:dw|

OpenStudy (anonymous):

square based pyramid

OpenStudy (anonymous):

oh wait...

OpenStudy (anonymous):

It would be 5 faces and 8 edges.

OpenStudy (anonymous):

yeah

OpenStudy (anonymous):

V - 8 + 5 = 2

OpenStudy (anonymous):

v = 5

OpenStudy (anonymous):

ya, and we can see that in this pic: |dw:1334962151865:dw|

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