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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. "
Elements of Geometry;: Containing the First Six Books of Euclid, with Two ... - الصفحة 18
بواسطة John Playfair - 1795 - عدد الصفحات: 400
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The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - 1762 - عدد الصفحات: 466
...line, &c. Q._E. D. PROP. XIV. THE OR. IF at a point in a ftraight iine, two other ftraight lines, Qpon the oppofite fides of it, make the adjacent angles...fame ftraight line, At the point B in the ftraight line AB, let the two ftraight lines, BC, BD upon the oppofite fides of AB, make the adjacent angles...
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The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ...

Robert Simson - 1775 - عدد الصفحات: 520
...therefore DBA, ABC are together equal to two right angles. Wherefore, when a ftraight line, &c. Q;.ED PROP. "XIV. THEO R. IF, at a point in a ftraight line, two...ftraight line. ' ' At the point B in the ftraight line AB, let thetwo ftraight lines BC, BD upon the oppofite fides of AB, make the adjacent angles ABC...
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The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - 1781 - عدد الصفحات: 466
...together«qual to two right angles. 'Wherefore when a ftraight line, &c. Q^ED PROP. XIV. THEO R. I' F at a point in a ftraight line, two other ftraight...adjacent angles together equal to two right angles, thefc two ftraight lines fhall be in one and the fame ftraight line, At the point B in the ftraight...
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The First Six Books: Together with the Eleventh and Twelfth

Euclid - 1781 - عدد الصفحات: 520
...right angles. Wheiefore, when a Itraight line, &c. Q^E. 1). PROP. XIV. T II EO R. IF, at a point in.a ftraight line, two other ftraight lines, upon the...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 line AB, let the two ftraight...
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The Elements of Euclid: Viz. the First Six Books, with the Eleventh and ...

Alexander Ingram - 1799 - عدد الصفحات: 351
...are together equal to two right angles. Wherefore, when a ftraight line, Sax. Q^ ED 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...
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The Elements of Euclid: Also the Book of Euclid's Data ...cor. viz. The ...

Robert Simson - 1804
...thereforeDB A, ABC are together equal to two right angles. Wherefore when a ftraight line, &c. Q^ED PROP. XIV. THEO R. IF at a point in a ftraight line, two...fame ftraight line. At the point B in the ftraight line AB, let the two ftraight lines, -A. BC, BD upon the oppofite fides of AB, make the adjacent angles...
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The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid, Robert Simson - 1806 - عدد الصفحات: 518
...PROP. XIV. THEOR. 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. At the point B, in the straight...
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The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclides - 1816 - عدد الصفحات: 528
...PROP. XIV. THEOR. 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 tw*o right angles, these two straight lines shall be in one and the same straight line. • At the point B in the straight...
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Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - 1819 - عدد الصفحات: 333
...XIV. THEOR. If, at a point in a straight line, t-sco other straight lines, upon the opposite sides of it, make the adjacent, angles together 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...
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Pantologia. A new (cabinet) cyclopædia, by J.M. Good, O. Gregory, and N ...

John Mason Good, Olinthus Gilbert Gregory - 1819
...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...
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