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Subject: Re: Off Topic - Homework Posted on: Mon, 12 May 2008 11:27:51 +0100


"George" wrote in message
news:a302dc40-460a-48ed-9e1a-70c98f67a72a@j22g2000hsf.googlegroups.com...
> "I am a 3d shape. I have one flat face. I have one curved face which
> meets at a vertex. What am I?"
>
> My 8 year old son's homework. Oh dear - I can't see how a flat face
> can meet a curved face at a vertex. All the rest are quite easy, or is
> it just me?
>
> Help, George.
>

It's a cone, the flat face doesn't meet the curved face at a vertex, the
curved face has a vertex.

See
http://en.wikipedia.org/wiki/Conic_section
http://en.wikipedia.org/wiki/Conical_surface
http://en.wikipedia.org/wiki/Cone_%28geometry%29