Dodecahedron (EntityTopic, 12)
From Hi.gher. Space
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{{Shape|Dodecahedron|http://img129.imageshack.us/img129/2226/dodecahedron8do.png|3|12, 30, 20|0|{[[Pentagon|5,]]3}|<nowiki>3 | 2 5 </nowiki>|''Unknown''|N/A|Equilateral [[triangle]], edge ''tau''|Doe|[[Icosahedron]]|N/A|N/A|N/A|none|~0.6649|''Unknown''|[[Pentagon|5]]<sup>3</sup>}} | {{Shape|Dodecahedron|http://img129.imageshack.us/img129/2226/dodecahedron8do.png|3|12, 30, 20|0|{[[Pentagon|5,]]3}|<nowiki>3 | 2 5 </nowiki>|''Unknown''|N/A|Equilateral [[triangle]], edge ''tau''|Doe|[[Icosahedron]]|N/A|N/A|N/A|none|~0.6649|''Unknown''|[[Pentagon|5]]<sup>3</sup>}} | ||
| - | + | == Equations == | |
| - | + | ||
*Assumption: Dodecahedron is centered at the origin. | *Assumption: Dodecahedron is centered at the origin. | ||
*Variables: | *Variables: | ||
Revision as of 11:15, 22 September 2007
Equations
- Assumption: Dodecahedron is centered at the origin.
- Variables:
l ⇒ length of edges of the dodecahedron
- The hypervolumes of a dodecahedron are given by:
total edge length = 30l
surface area = 15l2tan(3π10-1)
volume = 5l3(tan(3π10-1))2(tan(sin-1(2sin(π5-1))-1))2-1
- The planar cross-sections (n) of a dodecahedron are:
Unknown
| Notable Trishapes | |
| Regular: | tetrahedron • cube • octahedron • dodecahedron • icosahedron |
| Direct truncates: | tetrahedral truncate • cubic truncate • octahedral truncate • dodecahedral truncate • icosahedral truncate |
| Mesotruncates: | stauromesohedron • stauroperihedron • stauropantohedron • rhodomesohedron • rhodoperihedron • rhodopantohedron |
| Snubs: | snub staurohedron • snub rhodohedron |
| Curved: | sphere • torus • cylinder • cone • frustum • crind |
