... The common soccer ball shape is actualy a truncated icosahedron. The icosahedron has 12 corners with 5 equilateral triangles meeting at each corner. When ...
A soccer ball is made of pentagons and hexagons, with three edges meeting at each vertex. Why MUST the number of pentagons used be twelve ? LD Rafey Yahoo!...
610
Polytopia@yahoogroups...
Aug 8, 2004 5:27 pm
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609
Polytopia@yahoogroups...
Aug 8, 2004 5:23 pm
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608
Polytopia@yahoogroups...
Aug 8, 2004 5:22 pm
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607
Polytopia@yahoogroups...
Aug 8, 2004 5:20 pm
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... Why didn't you make the rhombus for [that other zonohedron] the rhombic dodecahedron? I have heard that http://www.clusterstructures.com/ has a...
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Paul Hildebrandt
paul@...
Aug 5, 2004 3:26 pm
I had a set of these in the 60s and even developed my own version based on the rhombus with diagonals in the divine proportion (i.e., rhombic triacontahedron...
Anyone remember the Flexagons? No, not http://mathworld.wolfram.com/Flexagon.html but rather the construction set of the 1950's that lets you build [Platonic,...
... <mcyberliver@y...> wrote: Our group is devoted to the study of Single and Multi-variable calculus. Topics open for discussion include: limits and...
... I just realized what an embarrassing mistake I made there. :-) Both icosahedrons and dodecahedrons have thirty edges, I *knew* that.... -- Paula Burch ...
... coming ... something ... to get ... place.. I ... place.. ... of it..? Oh, absolutely. My pieces were six inches shorter than yours (though I had more of...
Hi Paula, What a fun story!.. it’s great seeing all the ideas that everyone is coming up with.. and yours is no exception!.. Well. I had thought about...
Here's a link to my weblog on math toys: http://www.pburch.net/toys/B1915068958/ It's just reviews and photos, not a toy store, though there are links to toy...
Hi Dan, You go it totally.. I just need to have the copper end caps soldered or welded together at 108 degrees so the pipes can slip in.. I don’t want to ...
... diameter. It's ... If you can't find or make the connectors, there is another possible approach. When I was a graduate student in biology, back in the...
I didn't see the picture before but now I think I know what they are. They may be those end caps for copper pipes soldered or welded together at the right...
Yeah.. maybe! It was from a guys website who makes these as well for therapeutic purposes. He sells the whole kit for around $8000 though so I don't know that...
Hi Dan, Thanks for responding.. Looks like this will take a little more time than I hoped! I have found someone who will make me a jig that will do the job.. I...
... Has ... tips on ... I think such a piece you would have to craft yourself. I can't imagine that anyone would make a 3 way with the right dihedral angles of...
... Now, if only those Russian cabbies know where the choo-choo trains and the airports are! ;-) ... The pit-stop where they start; but now, they're on their...
Did you see the op ed on physics in Today's NYTimes? Ostensibly Hawkins and some junk known to be junk. The concern is how things will develop. But,...
"...he discovered at last that with great concentration and self- control he was able to change direction and bend wherever he chose. So he did, and made an ...
Hi everyone, I am working on a personal project right now that I wonder if you could perhaps advise me on! I am making a pentagonal dodecahedron frame (for ...
... wrote: An Olympic symbol can be derived from a Golden Rectangle (a rectangle 1 unit high by Phi units long). The technique for doing this is shown at...
Am I believing this???? Look at the Preface of book. That is real. So this new math is high interest in high circles. Again I suggested that you do a...
