Pentagon

In geometry, a pentagon (from pente, which is Greek for the number 5) is any five-sided polygon. A pentagon may be simple or self-intersecting. The sum of the internal angles in a simple pentagon is 540°. A pentagram is an example of a self-intersecting pentagon.

Read more about Pentagon:  Regular Pentagons, Construction of A Regular Pentagon, Cyclic Pentagons, Graphs, Pentagons in Tiling

Other articles related to "pentagon":

Pentagons in Tiling
... A pentagon cannot appear in any tiling made by regular polygons ... To prove a pentagon cannot form a regular tiling (one in which all faces are congruent), observe that 360 / 108 = 31⁄3, which is not a whole number ... More difficult is proving a pentagon cannot be in any edge-to-edge tiling made by regular polygons There are no combinations of regular polygons with 4 or more meeting at a vertex that contain a pentagon ...
Minerva Initiative - History
... thinking about culture and terrorism under the Pentagon’s roof will inevitably produce an intellectually shrunken outcome...The Pentagon will have the false ...
Pentagon Row
... Pentagon Row is an upscale outdoor shopping and residential center with storefronts facing South Joyce Street ... It is adjacent to the Fashion Centre at Pentagon City ...
Screwhead - Common Types - External Types - Pentagon
... A pentagon screw drive uses five-sided fastener heads ... for fire hydrants to have valves with a pentagon drive ...
Loudoun County Commuter Bus - Routes
... Purcellville to Rosslyn, the Pentagon and D.C ... Leesburg to Rosslyn, the Pentagon and D.C ... Dulles North Transit Center to Rosslyn, the Pentagon and D.C ...