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If a straight line meet two straight lines, so as to make the two interior angles on the same side of it taken together less than two right angles...
The first six books of the Elements of Euclid, with numerous exercises - Σελίδα 4
των Euclides - 1853 - 147 σελίδες
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## The Elements of Euclid

Euclid - 1838 - 416 σελίδες
...enclose a space. XI. All right angles arc equal to one another. XII. •• If a straight line meet two straight lines, so as to make the two " interior...right angles, these straight lines being continually pro" duced, shall at length meet upon that side on which are the angles " which are less than two right...

## The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Euclid, Robert Simson - 1838 - 416 σελίδες
...cannot enclose a space, XI. All right angles are equal to one another. XII. " If a straight line meet two straight lines, so as to make the two . " interior...right angles, these straight lines being continually pro" duced, shall at length meet upon that side on which are the angles " which are less than two right...

## The Elements of Euclid; viz. the first six books,together with the eleventh ...

Euclides - 1841 - 351 σελίδες
...equal to one another. XII. " If a straight line meet two straight lines, which are " in the same plane, so as to make the two interior " angles on the same...than two right angles, these straight lines being " produced, shall at length meet upon that side on " which are the angles which are less than two "...

## Elements of geometry: consisting of the first four,and the sixth, books of ...

Euclides - 1842
...circle may be described from any centre, at any distance from that centre. IV. [Ax. XI.] V. And that if a straight line meets two straight lines, so as...length meet upon that side on which are the angles less than two right angles. AXIOMS. I. THINGS which are equal to the same are equal to one another....

## Elements of Geometry: On the Basis of Dr. Brewster's Legendre : to which is ...

James Bates Thomson - 1844 - 237 σελίδες
...the necessity of a new axiom. Euclid's axiom alluded to is this : " If a straight line meet two other straight lines, so as to make the two interior angles...on the same side of it taken together less than two right-angles, these straight lines being continually produced, will at length meet on the side on which...

## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - 1844 - 317 σελίδες
...progress of the understanding, it will certainly retard it AXIOMS. The 12th Axiom of Euclid is, that " if a straight line meets two straight " lines, so as to make the two interior anples on the same side of it taken " together less than two right angles, these straight lines being...

## The First Six, and the Eleventh and Twelfth Books of Euclid's Elements: With ...

Euclid, James Thomson - 1845 - 352 σελίδες
...to one another. |j 12. If a straight line meet two other straight lines which are in the same plane, so as to make the two interior angles on the same...together, less than two right angles, these straight lines shall at length meet upon that side, if they be continually produced.^ * ln this axiom and the following,...

## The Elements of Euclid, the parts read in the University of Cambridge [book ...

Euclides - 1846
...to two right angles, and therefore the angles BEF, EFD are together less than two right angles : But If a straight line meets two straight lines, so as...make the two interior angles on the same side of it together less than two right angles, these straight lines, being continually produced, shall at length...

## Elements of the Philosophy of the Human Mind: In Two Parts, Μέρος 1

Dugald Stewart - 1847 - 627 σελίδες
...Euclid's Elements. When it is assorted, for example, that " if one straight line falls on two other straight lines, so as to make the two interior angles on the san»« side together equal to two right angles, these two straight lines, though indefinitely produced,...

## Elements of Geometry: Containing the First Six Books of Euclid : with a ...

John Playfair - 1849 - 317 σελίδες
...self-evident propositions. It is therefore removed from among the Axioms. The 12th Axiom of Euclid is, that " if a straight line meets two straight " lines, so...shall at length meet upon that side on which are the angle* " which are less than two right angles." Instead of this proposition, which, though true, is...