| Joseph Fenn - Mathematics - 1769
...PROPOSITION XIII. THEOREM FI. HF angles which one ftraight line FC makes with another AB upon pre fide **of it, are either two right angles, or are together equal to two right angles.** Hypothefis. Thefis. EC is aßraight line meeting I. Either each of У ACE, ECB, is a L.. AB in the... | |
| Robert Simson, Euclid - Trigonometry - 1775 - 520 pages
...was to be done. PROP. XIII. THEO R. angles which one ftraight line makes with another upon one ftde **of it, are either two right angles, or are together equal to two right angles** h 3. Port, c lo. t. - Def. t. Book I. Let the ftraight line AB make with CD, upon one fide, of it,... | |
| John Playfair - Euclid's Elements - 1795 - 400 pages
...PROP. XIII. THEO R. THE angles which one ftraight line makes with. another upon the one fide of it, arc **either two right angles, or are together equal to two right angles. . Let the** ftraight line AB make with CD, Upo-1 one fide of ui the angles CBA, ABD ; thefe ar. euher two iight... | |
| Alexander Ingram, Robert Simson - Trigonometry - 1799 - 351 pages
...line AB make with CD, upon one- fide of it, the a 5.Poft. b i0. i. BooK I. the angles CBA, ABD ; thefe **are either two right angles, or ' are together equal to two right angles.** For, if the angle CBA be equal to ABD, each of them is a A .Ax. Dfy y* ^^ *1> f* n \j U 3a \f a Dcf.... | |
| John Playfair - Euclid's Elements - 1804 - 440 pages
...Def. *• PROB. XIII. THEO R. THE angles which one ftraight line makes with another upon the one fide **of" it, are either two right angles, or are together equal to two right angles. Let the** ftraight line AB make with CD, upon one fide of it, the angles CBA, ABD ; thefe are either two right... | |
| Robert Simson - Trigonometry - 1804
...to be done. PROP. XIII. THEO R. THE angles which one ftraight line makes with another upon one fide **of it, are either two right angles, or are together equal to two right angles.** Poft Let the ftraight line AB make with CD, upon one fide of it* the angles CBA, ABD ; thefe are either... | |
| John Playfair - Trigonometry - 1806 - 311 pages
...Which was to be done. PROP. XIII. THEOR. THE angles which qne straight line makes with another upon **one side of it, are either two right angles, or are...it, the angles CBA, ABD ; these are either two right** or are together equal to two right angles. C Book I. * Def. 7. b 11. 1. " c 2.' Ax. d 1. Ax. For, if... | |
| Euclides - Geometry - 1816 - 528 pages
...I.. Let the straight line AB make with CD, upon one side v-*"V-' of it, the angles CBA> ABD : these **are either two right angles, or are together equal to two right angles.** • * For if the angle CB A be equal to ABD, each of them is a % A ' E DB D B C 1 Def. 10. right4 angle;... | |
| John Playfair - 1819 - 317 pages
...Which ivas to be done. PROP. XIII. THEOR. The angles which one straight line makes with another upon **one side of it, are either two right angles, or are...are either two right angles, or are together equal** to.two right angles. For, if the angle CBA be equal to ABD, each of them is rf right angle (Def. 7.)... | |
| John Playfair - Trigonometry - 1819 - 333 pages
...right angles. Let the straight line AB make witK CD, upon one side of it, the angles CBA, ABD ; these **are either two right angles, or are together equal to two right angles.** For, if the angle CBA be equal to ABD, each of them is a right angle (Def. 7.) ; but, if not, from... | |
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