The Todal wrote:
> "Alasdair" wrote in message
> news:s20g241s5ec7c900aeeqaj9ik3lndndibh@4ax.com...
>> On Mon, 12 May 2008 00:28:47 -0700 (PDT), George
>> wrote:
>>
>>> "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.
>> A cone?
>
> http://mathforum.org/library/drmath/view/54681.html
>
> "Dear Dr Math
> Our 4th grade math textbook defines a cone as "A solid figure with
> one circular face and one vertex." This sounds reasonable until you
> read the textbook's definitions for face, edge, and vertex. The
> textbook defines a face as "A flat surface of a solid." It defines an
> edge as "A line segment where two faces of a solid meet." It defines a
> vertex as "A point where two or more edges meet."
>
> Assuming that these definitions are accurate and that I'm not
> misinterpreting them, a cone must not have a vertex. If a cone has
> only one face, then it can't possibly have an edge. Therefore, if it
> doesn't have an edge, it can't have a vertex. "
>
>
The secret of success at examinations has always been to give the answer
that the examiner would have given, in your place.
I well remember a *university* first year question which gave a choice
of two, and only two, answers to the question of "Which is the better
source of energy?", (a) nuclear power stations or (b) coal fired power
stations.
--
Sue
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