2006-09-23 07:03:44 · 7 answers · asked by wqwqwswe 1 in Science & Mathematics ➔ Mathematics
A dodecohedron
2006-09-23 07:05:37 · answer #1 · answered by Anonymous · 0⤊ 0⤋
There are many... for instance, a prism (e.g. cookie jar) whose top and bottom are pentagons.
A *regular* polyhedron with 12 faces exists too: the dodecahedron, which has 12 regular pentagons for its faces. In each vertex, three pentagons come together. You could picture it as follows: take a flat regular pentagon; erect five pentagons on its sides. You now have half a dodecahedron. Make a similar shape of six more pentagons, and combine the two halves.
2006-09-23 15:57:08 · answer #2 · answered by dutch_prof 4 · 1⤊ 0⤋
Regular Dodecahedron
2006-09-23 14:08:58 · answer #3 · answered by alchemist0750 4 · 1⤊ 0⤋
There are many, actually. Three that can be inscribed in a sphere are: (a) the dodecahedron, with 12 pentagonal sides, and (b) a prism with decagons on the top and the bottom, and (c) a shape with pentagons on top and bottom and triangular sides connecting the pentagons.
2006-09-23 15:11:14 · answer #4 · answered by Anonymous · 1⤊ 0⤋
a dodecahedron
do=2 deca=10 so dodeca=12
2006-09-23 14:08:32 · answer #5 · answered by anonymous_20003 3 · 1⤊ 0⤋
a cube has 12 faces
2006-09-23 19:48:16 · answer #6 · answered by BURRIS S 1 · 0⤊ 1⤋
dodecahedron
http://en.wikipedia.org/wiki/Dodecahedron
2006-09-23 14:42:35 · answer #7 · answered by Sherman81 6 · 1⤊ 0⤋