**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

**Regular polygon** — A regular polygon is a polygon which is equiangular (all angles are congruent) and equilateral (all sides have the same length). Regular polygons may be convex or star.General propertiesThese properties apply to both convex and star regular… … Wikipedia

**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