Cylinder (EntityTopic, 14)
From Hi.gher. Space
(Difference between revisions)
m |
m |
||
| Line 8: | Line 8: | ||
| pv_circle=~0.3934 | | pv_circle=~0.3934 | ||
| pv_square=~π⁄4 ≈ 0.7854 | | pv_square=~π⁄4 ≈ 0.7854 | ||
| - | | extra={{STS Rotope | + | | extra={{STS Matrix| |
| + | <i>2 2</i> <s>0 0</s> | ||
| + | 0 0 0 0 | ||
| + | 2 1 2 1}}{{STS Rotope | ||
| attrib=pure | | attrib=pure | ||
| notation=21 (xy)z | | notation=21 (xy)z | ||
Revision as of 09:59, 10 November 2008
A cylinder is a special case of a prism where the base is a circle.
Equations
- Variables:
r ⇒ radius of cylinder
h ⇒ height of cylinder
- All points (x, y, z) that lie on the surface of a cylinder will satisfy the following equations:
x2 + y2 = r2
abs(z) ≤ h/2
-- or --
x2 + y2 < r2
abs(z) = h/2
- All points (x, y, z) that lie on the edges of a cylinder will satisfy the following equations:
x2 + y2 = r2
abs(z) = h/2
- The hypervolumes of a cylinder are given by:
total edge length = 4πr
surface area = 2πr(r+h)
volume = πr2h
- The planar cross-sections (n) of a cylinder are:
[!x,!y] ⇒ rectangle with width (2rcos(πn/2)), height (h)
[!z] ⇒ circle of radius (r)
| 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 |
| 6. [ Cuboid | 7. [(xy)z] Cylinder | 8. <[xy]z> Wide octahedron |
| List of bracketopes | ||
