| Title: | Mathematics at DEC |
| Moderator: | RUSURE::EDP |
| Created: | Mon Feb 03 1986 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2083 |
| Total number of notes: | 14613 |
What is a twenty-sided geometric figure called?
If anyone knows the answer to this question, or knows where I might
find the answer, I would appreciate it.
Thanks,
Joe
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1702.1 | for 3-D, 20 sides => Icosahedron | STAR::ABBASI | iam like for sure to the max | Sat Dec 12 1992 20:13 | 13 |
well, i looked the CRC handbook of math. curves and surfaces, and
for 2-D it only goes up to 12. (n=3 triangle,square,pentagon,hexagon,
heptagon,octagon,nonagon,decagon,undecagon,n=12 docdagon )
the above are all under category of REGULAR polygon. i think if you
find what 20 is in latin (that what these words are, i think), then stick
the word -agon at the end.
if you are looking for a 3-D object with 20 faces, then it is called
Icosahedron , they go like this (n=4 tetrahedron, n=6 Hexahedron,
n=8 Octahedron, n=12 Dodecahedron)
/nasser
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| 1702.2 | Greek | MOVIES::HANCOCK | Peter Hancock | Sat Dec 12 1992 21:06 | 6 |
Look up 20 in ancient greek. Does anyone know how the ancient greeks did calculations? What were their numerals like? | |||||
| 1702.3 | Thank You | DUCAT2::SMILEY | Sun Dec 13 1992 15:36 | 6 | |
Thanks you for the quick response. Icosahedron is the answer I was
searching for.
Regards,
Joe
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| 1702.4 | Greek. | CADSYS::COOPER | Topher Cooper | Mon Dec 14 1992 12:43 | 12 |
RE: .2
>Does anyone know how the ancient greeks did calculations?
Not off-hand.
>What were their numerals like?
Their numerals were the same as their letters. I forget the exact
system, but I believe that position was not important.
Topher
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| 1702.5 | CSC32::D_DERAMO | Dan D'Eramo, Customer Support Center | Mon Dec 14 1992 14:20 | 10 | |
re .-1,
>> >Does anyone know how the ancient greeks did calculations?
>>
>> Not off-hand.
That looks like a roundabout way of saying they counted on
their fingers. :-)
Dan
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