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" If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line. "
The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ... - Σελίδα 22
των Euclid - 1810 - 518 σελίδες
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The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ...

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..."XIV. THEO R. IF, at a point in a ftraight line, two other ftraight lines, upon the oppofite fides of it, make the adjacent angles together equal to two right angles, thefe two ftraight lines fhall be in one and the fame ftraight line. ' ' At the point B in the ftraight...

The First Six Books: Together with the Eleventh and Twelfth

Euclid - 1781 - 552 σελίδες
...XIV. T II EO R. IF, at a point in.a ftraight line, two other ftraight lines, upon the oppofite fides of it, make the adjacent angles together equal to two right angles, thefe two ftraight lines mall be in one and the fame ftraight line. At the point B in the ftraight...

Elements of Geometry;: Containing the First Six Books of Euclid, with Two ...

Euclid, John Playfair - 1795 - 462 σελίδες
...P. XIV. THEO R. IF, at a point in a ftraight line, two other ftraight lines, upon the oppofite fides of it, make the adjacent angles together equal to two right angles, thefe two ftraight lines fhall be in one and the fame ftraight line. At the point B in the ftraight...

The Elements of Euclid: Viz. the First Six Books, with the Eleventh and ...

Alexander Ingram - 1799 - 374 σελίδες
...FROP. XIV. THEOR. at a point in a ftraight line, two other ftraight lines, upon the oppoiite fides of it, make the adjacent angles together equal to two right angles, thefe two ftraight lines fliall be in one and the fame ftraight line. At the point B in the ftraight...

The Elements of Euclid: Also the Book of Euclid's Data ...cor. viz. The ...

Robert Simson - 1804 - 530 σελίδες
...PROP. XIV. THEO R. IF at a point in a ftraight line, two other ftraight lines, upon the oppofite fides of it, make the adjacent angles together equal to two right angles, thefe two ftraight lines fhall be in one and the fame ftraight line. At the point B in the ftraight...

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

John Playfair - 1806 - 320 σελίδες
...together equal to two right angles. Wherefore, when a straight line, &c. C£. ED PROP. XIV. THEOR. IF, at a point in a straight line, two other straight...straight line. At the point B, in the straight line AB, let the two straight lines BC, BD, upon the opposite sides of AB, make the adjacent angles ABC,...

Pantologia. A new (cabinet) cyclopædia, by J.M. Good, O. Gregory ..., Τόμος 5

John Mason Good - 1813 - 714 σελίδες
...siile of it, are either two right angles, or are together rqual to two right angles. Prop. XIV. Tlieor. If, at a point in a straight line, two other straight lines, upon the opposite iidrs of it, make the adjacent angles together equal to t«-o right angles, these two straight lines...

The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclides - 1816 - 588 σελίδες
...ABC are together equal to two right-angles. Wherefore when a straight line, &c. QED PROP. XIV. THEOR. IF, at a point in a straight line, two other straight...straight line. • At the point B in the straight line AB, let the two straight lines BC, BD upon the opposite sides of AB, make the adjacent angles ABC,...

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

John Playfair - 1819 - 354 σελίδες
...Wherefore, .when a straight line, &c. Q, ED PROP. XIV. THEOR. If, at a point in a straight line, too other straight lines, upon the -opposite sides of...equal to two right angles, these two straight lines are in one and the same straight line. At the point B in the straight line AB, let the two straight...

Pantologia. A new (cabinet) cyclopædia, by J.M. Good, O. Gregory ..., Τόμος 5

John Mason Good - 1819 - 800 σελίδες
...Prop. XIV. Theor. If, at a point in a straight bit, two other straight lines, upon the opposite ¿act of it, make the adjacent angles together equal to two right angles, these two straight linei ¿all be in one and ihe .same straight line. I'rop. XV. Theor. If two straight lines cut one...




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