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Extra credit math problem help

Hi guys, I have this extra credit math problem that completely mind-f'd me.

A dodecahedron has twelve faces, all of which are regular pentagons. Three edges meet at each vertex of the dodecahedron.
An interior diagonal is a segment connecting two vertices, so that the segment is neither an edge nor is it along a face of the dodecahedron.
How many interior diagonals does a regular dodecahedron have?

Yea i had trouble even typing this question out for you guys lmao.

April 22, 2012

3 Comments • Newest first

vaelietta

[url=http://answers.yahoo.com/question/index?qid=20110126171609AA4YtUI]The power of google[/url]

edit: [url=http://www.wolframalpha.com/input/?i=dodecagon]ignore the first link. This one should help maybe[/url]

Reply April 22, 2012 - edited
skylinebossz

Why don't you try to draw it out?

Reply April 22, 2012 - edited
AestheticLove

I have the best solution for your extra credit math issue.
Don't do it.

Reply April 22, 2012 - edited