| Robert Simson, Euclid - Trigonometry - 1775 - 520 pages
..."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... | |
| Euclid - 1781 - 520 pages
...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... | |
| John Playfair - Euclid's Elements - 1795 - 400 pages
...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... | |
| Alexander Ingram, Robert Simson - Trigonometry - 1799 - 351 pages
...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... | |
| Robert Simson - Trigonometry - 1804
...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... | |
| John Playfair - Trigonometry - 1806 - 311 pages
...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,... | |
| John Mason Good, Olinthus Gilbert Gregory - 1813
...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... | |
| Euclides - Geometry - 1816 - 528 pages
...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,... | |
| John Playfair - 1819 - 317 pages
...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... | |
| 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 lines cut one... | |
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