| Robert Simson - Trigonometry - 1762 - 488 pages
...Book!. Let the ftraight line AB make with CD, upon one fide of it, the Vxv^ angles CBA, ABP ; thefe **are either two right angles, or are together equal to two right angles.** a. Def. 10. For if the angle CBA be equal to ABD, each of them is a right ^ E ri Ax. di Ax. B B angle.... | |
| Joseph Fenn - Mathematics - 1769 - 536 pages
...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 - Trigonometry - 1775 - 534 pages
...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,... | |
| Robert Simson - Trigonometry - 1781 - 534 pages
...Pod: Book I. Let the ftraight line AB make with CD, upon one fide of if, 1 the angles CBA, ABD ; thefe **are either two right angles, or are together equal...angle CBA be equal to ABD, each of them is a right*** AE a. Def. i0. DBG bni angle. but if not, from thepoint B draw BE at right anglesbto CD. therefore... | |
| Euclid - 1781 - 552 pages
...Let the ftraight line AB make with CD, upon one fide of it, the angles CBA, ABD ; thefe are cither **two right angles, or are together equal to two right...if the angle CBA be equal to ABD, each of them is a** A D B i def. i0. r;j,ht a angle; but, if not, from the point B draw BE at right b it. t. angles b to... | |
| Alexander Ingram - Trigonometry - 1799 - 374 pages
...done. PROP. XIII. THEOR. 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 flraight line AB make with CD, upon one- fide of it, the a 5.Poft. b i0. i. BooK I. the angles... | |
| Robert Simson - Trigonometry - 1804 - 530 pages
...angles. Poft Let the ftraight line AB make with CD, upon one fide of it* the angles CBA, ABD ; thefe **are either two right angles, or are together equal to two right angles.** a. Def. 10. For if the angle CBA be equal to ABD, each of them is a right • AE b. it. I. c. 2. Ax.... | |
| Robert Simson - Trigonometry - 1806 - 546 pages
...Book I. Let the straight line AB make with CD, upon one side of it, *— v— ' the angles CBA, ABD; **these are either two right angles, or are together...if the angle CBA be equal to ABD each of them is a** aDef.10. right > angle; but if not, from the point B draw BE at right AEA D B C D B C c 2. Ax. b 11.... | |
| Euclides - 1816 - 588 pages
...BouK 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; but if not, from... | |
| John Playfair - 1819 - 354 pages
...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** rf right angle (Def. 7.) ; but, if not, from the point B draw BE at right anA T> C T) B gles (11. 1.)... | |
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