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25 facts about the pentagon

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Meaning of pentagon in English

So a given atom may be part of two benzene rings and a pentagon, all at the same time.

From Ars Technica

Because of math, the old keyboard rolled up into a square, but the new keyboard rolls up into a pentagon.

From The Verge

Each relator is realized on the boundary of the unions of n = 5 congruent right-angled regular hyperbolic pentagons, arranged as row houses atop a geodesic segment.

From the Cambridge English Corpus

It is a pentagon or five-sided turret of dry twigs, like a log chimney, and is silk-lined within.

From Project Gutenberg

Now it is made up of twelve equilateral and equangular quinquangles (or pentagons), each of which consists of thirty of the first scalene triangles.

From Project Gutenberg

A figure of five sides is called a pentagon, of six sides a hexagon, of eight sides an octagon.

From Project Gutenberg

Regular pentagon, a pentagon in which the angles are all equal, and the sides all equal.

From Project Gutenberg

Score at the line of junction and bend the side pentagons till the
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Pentagon

A pentagon is a geometrical shape, which has five sides and five angles. Here, “Penta” denotes five and “gon” denotes angle. The pentagon is one of the types of polygons. The sum of all the interior angles for a regular pentagon is 540 degrees.

Table of contents:

In Geometry, we study about different types of shapes. The two-dimensional shape that is composed of straight lines and interior angles is known as a polygon. The examples of polygons are:

  • Triangle (three-sided polygon)
  • Quadrilateral (four-sided polygon)
  • Pentagon (five-sided polygon)
  • Hexagon (six-sided polygon)
  • Heptagon (seven-sided polygon)
  • Octagon (eight-sided polygon) and so on.

In this article, you can learn about the five-sided polygon called “pentagon” with proper definition, shape, sides, properties along with its perimeter and area of a pentagon formula in detail.

Pentagon Definition

A pentagon is a polygon with 5 sides and 5 angles. The word “pentagon” is made up of two words, namely Penta and Gonia, which means five angles. All the sides of a pentagon meet wi

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The Pentagon

Headquarters of the U.S. Department of Defense in Arlington, Virginia

For other uses, see The Pentagon (disambiguation).

The Pentagon

A view of the Pentagon from above the Potomac River in 2018

Architectural styleClassical Revival, Modern, and Stripped Classicism
LocationRichmond Hwy./VA 110 at I-395, Arlington County, Virginia, U.S.
Coordinates38°52′15″N77°03′18″W / 38.87083°N 77.05500°W / 38.87083; -77.05500
Construction started11 September 1941 (1941-09-11)
Completed15 January 1943 (1943-01-15)
Cost$83 million (equivalent to $1.33 billion in 2023)[1]
OwnerUnited States Department of Defense
Roof77 ft (23 m)[2]
Floor count7 (2 underground)
Floor area6,636,360 sq ft (620,000 m2)
Architect(s)George Bergstrom
David J. Witmer
Main contractorJohn McShain, Inc.
Parking67 acres (27 ha)

Pentagon Office Building Complex

U.S. National Register of Historic Places

Virginia Landm

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