Difference between revisions of "Intersect"
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When two lines are not parallel, they must intersect. | When two lines are not parallel, they must intersect. | ||
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Revision as of 12:49, March 27, 2008
Mathematical objects intersect when they have something in common. For example, the sets {1,2,3,4} and {2,4,6} intersect as {2,4}.
From geometry we have another example. Euclid postulated that:
When two lines are not parallel, they must intersect.
Non-Euclidean geometry concerns geometries where the conclusion need not hold.
