Difference between revisions of "Diameter"

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A '''diameter''' of a [[circle]] is a [[chord]] of that circle which passes through the [[center]].  Thus a diameter divides the circle into two regions of equal [[area]].
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A '''diameter''' of a [[circle]] is a [[chord]] of that circle which passes through the [[center]].  Thus a diameter divides the circle into two regions of equal [[area]] called [[semicircle]]s.
  
 
[[Image:Diameter.PNG|center]]
 
[[Image:Diameter.PNG|center]]

Latest revision as of 10:01, 15 February 2009

A diameter of a circle is a chord of that circle which passes through the center. Thus a diameter divides the circle into two regions of equal area called semicircles.

Diameter.PNG


Diameter of a set

The diameter of more general sets can also be defined. In any given metric space (that is, anywhere you can measure distances between points such as normal Euclidean 3-D space, the surface of the Earth, or any real vector space) the diameter of a bounded set of points is the supremum of the distances between pairs of points. In the case where the set of points is a circle, the diameter is the length of the diameter of the circle.