Euclid, Elements of Geometry, Book I, Common Notions
(Edited by Sir Thomas L. Heath, 1908)
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Things which are equal to the same thing are also
equal to one another.
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If equals be added to equals, the wholes are equal.
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If equals be subtracted from equals, the remainders are equal.
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Things which coincide with one another are equal to one another.
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The whole is greater than the part.
Book I: Euclid, Book I (ed. Sir Thomas L. Heath, 1st Edition, 1908)
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Axioms or Common Notions in other editions: