Topic
Playfair's axiom.
statement equivalent to Euclid's parallel postulate, that given a line and a point not on it, there is at most one line parallel to the given line through the point
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About Playfair's axiom
In geometry, Playfair's axiom is an axiom that can be used instead of the fifth postulate of Euclid :In a plane, given a line and a point not on it, at most one line parallel to the given line can be drawn through the point.
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