Regular pentagon
Pentagon Pen"ta*gon, n. [Gr. ?; ? (see {Penta-}) + gwni`a angle: cf. L. pentagonium, F. pentagone.] (Geom.) A plane figure having five angles, and, consequently, five sides; any figure having five angles. [1913 Webster]

{Regular pentagon}, a pentagon in which the angles are all equal, and the sides all equal. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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• regular pentagon — five sided figure in which all sides and angles are equal …   English contemporary dictionary

• Pentagon — Pen ta*gon, n. [Gr. ?; ? (see {Penta }) + gwni a angle: cf. L. pentagonium, F. pentagone.] (Geom.) A plane figure having five angles, and, consequently, five sides; any figure having five angles. [1913 Webster] {Regular pentagon}, a pentagon in… …   The Collaborative International Dictionary of English

• Pentagon — In geometry, a pentagon is any five sided polygon. A pentagon may be simple or self intersecting. The internal angles in a simple pentagon total 540°. Regular pentagons The term pentagon is commonly used to mean a regular convex pentagon, where… …   Wikipedia

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• pentagon — pentagonal /pen tag euh nl/, adj. pentagonally, adv. /pen teuh gon /, n. 1. a polygon having five angles and five sides. 2. the Pentagon, a. a building in Arlington, Virginia, having a plan in the form of a regular pentagon, containing most U.S.… …   Universalium

• Regular polytope — In mathematics, a regular polytope is a polytope whose symmetry is transitive on its flags, thus giving it the highest degree of symmetry. All its elements or j faces (for all 0≤ j ≤ n , where n is the dimension of the polytope) cells, faces and… …   Wikipedia

• pentagon —    A closed two dimensional shape (polygon) bounded by five straight line segments. The formula with which to find an equilateral pentagon s area is 1.7205 times the length of one side squared. Also see mathematics and regular …   Glossary of Art Terms

• The Pentagon — Infobox Military Structure name= The Pentagon location= Arlington, Virginia caption= Southwest view of the Pentagon with the Potomac River and Washington Monument in background. type= Headquarters of the U.S. Department of Defense built= 1943… …   Wikipedia

• Dodecahedron — Regular Dodecahedron (Click here for rotating model) Type Platonic solid Elements F = 12, E = 30 V = 20 (χ = 2) Faces by sides 12{5} …   Wikipedia

• Golden ratio — For the Ace of Base album, see The Golden Ratio (album). Not to be confused with Golden number. The golden section is a line segment divided according to the golden ratio: The total length a + b is to the length of the longer segment a as the… …   Wikipedia