a cilindrical hat box or similar
On Thu, 25 Aug 2016 10:36:02 +0200, G.Dubois wrote:
Those traffic cones are a GREAT idea for visual aids to show conic sections
in a classroom!
For one thing, they're bright orange, and pretty big (so the kids won't
steal them) and they're rubbery (so nobody is going to get stabbed by one),
and they have a nice base (so they will stay in a corner) and they are
visually unusual (so the kids will remember them for decades).
It's probably too hard to double-nap them, but as a single-napped cone,
they are a great idea. I even have some spares I can cut open for the kids
to see. I'll check that out.
Thank you for that great idea.
I knew there were be conics lying around the house!
On Sat, 20 Aug 2016 13:58:30 -0400, burfordTjustice wrote:
Google doesn't find the answer to the question unless the *exact* question
For example, G. Dubois suggested traffic cones, which would never be found
simply by googling for conic sections for a math class.
And, googling for conic sections for a math class finds the stuff that dpb
found, which are absolutely gorgeous and perfect - but they cost $100 which
is out of the picture.
So, google doesn't always work.
It fails when the constraints are different than the norm.
In this case, "cost" is a huge constraint.
Theft is also a constraint (where the traffic cone excels).
Size is also a constraint (the bigger the better in this case).
So, my point is that google didn't find that which I seek.
I once found some nice partial cones in a dumpster outside a textile
mill. Spindle cones I think they are called. They were hollow, and the
tip was truncated, but they were as cheap as you can get I think.
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