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Radius

From Encyclopedia of Mathematics
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of a circle

A segment joining a point of the circle (or sphere) to the centre. The length of this segment is also called the radius.


Comments

For the radius of curvature of curves, surfaces and higher-dimensional differential-geometric objects, cf. e.g. Curvature and Differential geometry.

References

[a1] M. Berger, "Geometry" , I , Springer (1987)
[a2] H.S.M. Coxeter, "Introduction to geometry" , Wiley (1963)
How to Cite This Entry:
Radius. BSE-3 (originator), Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Radius&oldid=12340
This text originally appeared in Encyclopedia of Mathematics - ISBN 1402006098