Difference between revisions of "Ray"
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(Undo revision 534191 by Marcdaniels (Talk) the text does not assert one infinity is bigger than the other) |
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A '''ray''' is a portion of a [[line]] which starts at a given [[point]] and continues endlessly in one direction. Intuitively, it can be thought of as "half" a line because it extends [[infinite]]ly in only one direction rather than two, opposite directions as lines do. Of course, quantitatively, "half a line" is somewhat meaningless since a line is infinite and half of infinity is still infinity. | A '''ray''' is a portion of a [[line]] which starts at a given [[point]] and continues endlessly in one direction. Intuitively, it can be thought of as "half" a line because it extends [[infinite]]ly in only one direction rather than two, opposite directions as lines do. Of course, quantitatively, "half a line" is somewhat meaningless since a line is infinite and half of infinity is still infinity. | ||
| − | [[Category:Geometry]] | + | [[Category:Plane Geometry]] |
Revision as of 02:07, January 16, 2009
A ray is a portion of a line which starts at a given point and continues endlessly in one direction. Intuitively, it can be thought of as "half" a line because it extends infinitely in only one direction rather than two, opposite directions as lines do. Of course, quantitatively, "half a line" is somewhat meaningless since a line is infinite and half of infinity is still infinity.