Difference between revisions of "Radius"

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The '''radius''' of a [[circle]] is the distance from the center to any point on the circle.  Identical definitions hold for the [[sphere]] and [[hypersphere]]. The plural form of radius is radii.
 
The '''radius''' of a [[circle]] is the distance from the center to any point on the circle.  Identical definitions hold for the [[sphere]] and [[hypersphere]]. The plural form of radius is radii.
  
<asy>size(115);
+
<asy>size(150);
 
pair O=origin, P=dir(30);
 
pair O=origin, P=dir(30);
 
D(unitcircle);
 
D(unitcircle);

Revision as of 22:08, 4 February 2019

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The radius of a circle is the distance from the center to any point on the circle. Identical definitions hold for the sphere and hypersphere. The plural form of radius is radii.

[asy]size(150); pair O=origin, P=dir(30); D(unitcircle); D(O--P); MP("O",D(O),NNW); MP("P",D(P),NE); MP("r",midpoint(O--P),NNW);[/asy]

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