Euclid, Elements, BOOK I., DEFINITIONS., 23

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BOOK I. BOOK II. BOOK III. BOOK IV. BOOK V. BOOK VI. BOOK VII. BOOK VIII. BOOK IX. BOOK X. BOOK XI. BOOK XII. BOOK XIII.

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DEFINITIONS. POSTULATES. COMMON NOTIONS. BOOK I. PROPOSITIONS.

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23

Parallel straight lines are straight lines which, being in the same plane and being produced indefinitely in both directions, do not meet one another in either direction.

Euclid. Euclid's Elements. Sir Thomas Little Heath. New York. Dover. 1956.

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Citation URI: http://data.perseus.org/citations/urn:cts:greekLit:tlg1799.tlg001.perseus-eng1:1.def.23

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Euclid, Elements
Thomas L. Heath, Sir Thomas Little Heath, Ed.

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Euclid, Elements Thomas L. Heath, Sir Thomas Little Heath, Ed.

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Euclid, Elements
Thomas L. Heath, Sir Thomas Little Heath, Ed.