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{{otheruses}} | |||
==Hexagon construction== | |||
{| border="1" bgcolor="#ffffff" cellpadding="5" align="right" style="margin-left:10px" width="250" | |||
⚫ | A regular hexagon is ] with ]. The following is a step-by-step animated method of this, given by ]'s '']'', Book IV, Proposition 15. | ||
!bgcolor=#e7dcc3 colspan=2|Regular hexagon | |||
] | |||
|- | |||
|align=center colspan=2|]<BR>A regular hexagon, {6} | |||
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|bgcolor=#e7dcc3|]s and ]||6 | |||
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|bgcolor=#e7dcc3|]s||{6}<BR>t{3} | |||
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|bgcolor=#e7dcc3|]s||]]]<BR>]]] | |||
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|bgcolor=#e7dcc3|]||] (D<sub>6</sub>) | |||
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|bgcolor=#e7dcc3|]<BR>(with ''t''=edge length)||<math>A = \frac{3 \sqrt{3}}{2}t^2</math><BR><math> \simeq 2.598076211 t^2.</math> | |||
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|bgcolor=#e7dcc3|]<BR>(]s)||120° | |||
|} | |||
==Hexagon by man and nature== | |||
In ], a '''hexagon''' is a ] with six edges and six ]. A regular hexagon has ] {6}. | |||
== Regular hexagon == | |||
⚫ | |||
The internal ]s of a regular hexagon (one where all sides and all angles are equal) are all | |||
120] and the hexagon has 720 degrees. It has 6 lines of symmetry. Like ]s and ] ]s, regular hexagons fit together without any gaps to ''tile the plane'' (three hexagons meeting at every vertex), and so are useful for constructing ]s. | |||
The cells of a ] ] are hexagonal for this reason and because the shape makes efficient use of space and building materials. The ] of a regular triangular lattice is the honeycomb tessellation of hexagons. | |||
The area of a regular hexagon of side length <math>t\,\!</math> is given by | |||
<math>A = \frac{3 \sqrt{3}}{2}t^2 \simeq 2.598076211 t^2.</math> | |||
The perimeter of a regular hexagon of side length <math>t\,\!</math> is, of course, <math>6t\,\!</math>, its maximal diameter <math>2t\,\!</math>, and its minimal diameter <math>t\sqrt{3}\,\!</math>. | |||
There is no ] made of regular hexagons. The ]s with some hexagonal faces are the ], ], ] (of ] ball and ] fame), ] and the ]. | |||
==Hexagons: in nature and by humankind== | |||
<gallery> | <gallery> | ||
Image:Fort-Jefferson Dry-Tortugas.jpg| | |||
Image:Honey_comb.jpg|A beehive ] | |||
Image:Carapax.svg|The scutes of a turtle's ] | |||
Image:Saturn_hexagonal_north_pole_feature.jpg|North polar hexagonal cloud feature on ], discovered by ] and confirmed in 2006 by ] | |||
Image:Snowflake 300um LTSEM, 13368.jpg|Micrograph of a snowflake | |||
Image:Hexa-peri-hexabenzocoronene ChemEurJ 2000 1834.jpg|Crystal structure of a ] composed of hexagonal aromatic rings reported by Müllen and coworkers in Chem. Eur. J., 2000, 1834-1839. | |||
Image:Giants causeway closeup.jpg|Naturally formed ] columns from ] in ]; large masses must cool slowly to form a polygonal fracture pattern | |||
Image:Fort-Jefferson Dry-Tortugas.jpg|An aerial view of Fort Jefferson in ] | |||
Image:Jwst front view.jpg|The ] mirror is composed of 18 hexagonal segments. | |||
Image:France.jpg| ] has a vaguely hexagonal shape. In French, "L'hexagone" sometimes refers to the country. | |||
</gallery> | </gallery> | ||
⚫ | == |
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*]: 6-sided star within a regular hexagon | |||
*]: single path, 6-sided star, within a hexagon | |||
*]: a ] of hexagons in a plane | |||
⚫ | *] | ||
== External links == | == External links == | ||
* {{MathWorld|title=Hexagon|urlname=Hexagon}} | |||
* With interactive animation | * With interactive animation | ||
* | |||
⚫ | ==See also== | ||
* | |||
⚫ | *] | ||
* | |||
* - from ] (27 March 2007) | |||
{{Polygons}} | {{Polygons}} | ||
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Revision as of 03:28, 17 January 2008
fuck fuck fuck shit
Hexagon construction
A regular hexagon is constructible with compass and straightedge. The following is a step-by-step animated method of this, given by Euclid's Elements, Book IV, Proposition 15.
Hexagon by man and nature
External links
- Definition and properties of a hexagon With interactive animation
See also
Polygons (List) | |||||||
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Triangles | |||||||
Quadrilaterals | |||||||
By number of sides |
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Star polygons | |||||||
Classes |