the radius of a circle

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• Radius of curvature (applications) — The distance from the center of a sphere or ellipsoid to its surface is its radius. The equivalent surface radius that is described by radial distances at points along the body s surface is its radius of curvature (more formally, the radius of… …   Wikipedia

• Radius — For other uses, see Radius (disambiguation). Circle illustration In classical geometry, a radius of a circle or sphere is any line segment from its center to its perimeter. By extension, the radius of a circle or sphere is the length of any such… …   Wikipedia

• radius — /ray dee euhs/, n., pl. radii / dee uy /, radiuses. 1. a straight line extending from the center of a circle or sphere to the circumference or surface: The radius of a circle is half the diameter. 2. the length of such a line. 3. any radial or… …   Universalium

• radius — n. & v. n. (pl. radii or radiuses) 1 Math. a a straight line from the centre to the circumference of a circle or sphere. b a radial line from the focus to any point of a curve. c the length of the radius of a circle etc. 2 a usu. specified… …   Useful english dictionary

• radius — ra•di•us [[t]ˈreɪ di əs[/t]] n. pl. di•i [[t] diˌaɪ[/t]] di•us•es 1) math. a straight line extending from the center of a circle or sphere to the circumference or surface: The radius of a circle is half the diameter 2) math. the length of such a… …   From formal English to slang

• circle — {{Roman}}I.{{/Roman}} noun 1 shape ADJECTIVE ▪ complete, full ▪ The stones form a complete circle. ▪ How long does it take for the dial to rotate through a full circle? ▪ concentric …   Collocations dictionary

• circle — cir|cle1 [ sɜrkl ] noun count *** 1. ) a round shape consisting of a curved line that completely encloses a space and is the same distance from the center at every point. Something in the shape of a circle is circular: a mathematical calculation… …   Usage of the words and phrases in modern English

• circle — I UK [ˈsɜː(r)k(ə)l] / US [ˈsɜrk(ə)l] noun [countable] Word forms circle : singular circle plural circles *** 1) a) a round shape consisting of a curved line that completely encloses a space and is the same distance from the centre at every point …   English dictionary

• radius — [[t]re͟ɪdiaɪ[/t]] radii 1) N SING: with supp The radius around a particular point is the distance from it in any direction. Nigel has searched for work in a ten mile radius around his home. 2) N COUNT The radius of a circle is the distance from… …   English dictionary

• radius of curvature — noun the radius of that circle (called the osculating circle) whose arc best approximates a curve in the vicinity of a point on the curve …  

• Circle-ellipse problem — The circle ellipse problem in software development (sometimes known as the square rectangle problem) illustrates a number of pitfalls which can arise when using subtype polymorphism in object modelling. The issues are most commonly encountered… …   Wikipedia