 | Robert Simson - Trigonometry - 1762 - 488 pages
...angles they make at the point where they cut, are together equal to four right angles. CoR. 2. And confequently that all the angles made by any number...lines meeting in one point, are together equal to four ri^ht angles. PROP. B Book I. PROP. XVI. THEOR, \-or>^ TF one fide of a triangle be produced, the exterior... | |
 | Robert Simson - Trigonometry - 1775 - 534 pages
...angles they make at Hie point where they cut, are together equal to four right angles. CoR. 2. And confequently that all the angles made by any number of lines meeting in one pohAare together equal to four right angles. PROP. Book I. B 10. i. e 4- 1• I3. i. PROP. XVI. THEO... | |
 | Euclid - 1781 - 552 pages
...angles they make at the point where they cut, arc together equal to four right angles. CoR. 2. And confequently that all the angles made by any number...lines meeting in one point, are together equal to four rich: angles. PR on. Book I. a. i0. i. S. I{. i. c-4 I. 4. t5. i. a. i6. t. PROP. XVI. THEO R. IF one... | |
 | Alexander Ingram - Trigonometry - 1799 - 374 pages
...make at the point where they cut, are together equal to four right angles. CoR. 2. And confequrntly, that all the angles made by any number of lines meeting in one point, are together equal to four right angle?. CoR. 3. Likewife, if two ftrnight lines CE, ED, on oppofite fides of a ftraight line AB, meet... | |
 | Robert Simson - Trigonometry - 1804 - 530 pages
...make at the point where they cut, are together equal to four right angles. CoR. 2. Ağd confequentiy that all the angles made by any number of lines meeting in one point, are together oqual to four right angles. _ Book I. b. 15. i. c. 4. i. d. 15. i. a. in, i. , PROP. XVI. THEOR. IF... | |
 | John Playfair, Euclid - Circle-squaring - 1804 - 468 pages
...together equal to four right angles. CoR. 2: And hence, all the angles made by .<.ny number of ftraight lines meeting in one point, are together equal to four * right angles. C a PROP. Book I. . PROP. XVI. THEO R. IF one fide of a triangle be produced, the exterior angle is... | |
 | Robert Simson - Trigonometry - 1806 - 546 pages
...make at the point where they cut are together equal to four right angles. CoR. 2. And, consequently, that all the angles made by any number of lines meeting...one point, are together equal to four right angles. Book I. PROP. XVI. THEOR. a 10. 1. b IS. 1. the angle the angle are oppotherefore B IF one side of... | |
 | Euclides - 1814 - 560 pages
...make at the point where they cut, are together equal to four right angles. C0R. 2. And consequently that all the angles made by any number of lines meeting in one point, are together •qua! to four right angles. C PROP. XVI. THEOR. IF one side of a triangle be produced, the exterior... | |
 | Ralph Griffiths, George Edward Griffiths - 1816 - 574 pages
...restored the text of his author. In proposition 15. the editor has left out the second corollary, viz. " that all the angles made by any number of lines meeting...one point are together equal to four right angles." This, it seems, has not a place in most of the MSS. of the Imperial Library, but is found in some of... | |
 | John Playfair - 1819 - 354 pages
...together equal to four right angles. COR. 2. And hence, all the angles made by any number of straight lines meeting in one point, are together equal to four right angles-. r PROP. XVI. THEOR. If one side of a triangle be produced, the exterior angle is greater than cither... | |
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Therefore if two straight lines, &c. QED COR. 1. From this it is manifest, that, if two straight lines cut one another, the angles they make at the point where they cut, are together equal to four right angles. 
