 | Peter Nicholson - Mathematics - 1825 - 1046 pages
...make at the point where they cut, are together equal to four right angles. Сок. 2. And consequently that all the angles made by any number of lines meeting...one point, are together equal to four right angles. Proposition XVI, Theorem . If one side of a triangle be produced, the exterior angle is greater than... | |
 | George Lees - 1826 - 276 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. OF GEOMETKV. Book I. aCor.2.4.1. g Cons. PROP. VI. THEOREM. If one side BC of any triangle, ABC, be... | |
 | Robert Simson - Trigonometry - 1827 - 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. PROP. XVI. THEOR. If one side of a triangle be produced, the exterior angle is greater than either... | |
 | Robert Simson - Trigonometry - 1835 - 544 pages
...equal to four right angles. COR. 2. And consequently that all the angles made by any number of straight lines meeting in one point, are together equal to four right angles. PROP. XVI. THEOR. If one side of a triangle be produced, the exterior angle is greater than either... | |
 | Euclid - 1835 - 540 pages
...equal to four right angles. COR. 2. And consequently that all the angles made by any number of straight lines meeting in one point, are together equal to four right angles. b 15. 1. c 4. I. PROP. XVI. THEOR. Book i. . If one side of a triangle be produced, the exterior v*->v-";... | |
 | Mathematics - 1836 - 488 pages
...are together equal to four right angles. 2. And hence, all the angles made by any number of straight lines meeting in one point, are together equal to four right angles. XVI. If one side of a triangle be produced, the exterior angle is greater than either of the interior,... | |
 | Euclid, James Thomson - Geometry - 1837 - 410 pages
...make at their point of intersection, 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. PROP. XIV. THEOR. IF, at a point in a straight line, two other straight lines on the opposite sides... | |
 | Andrew Bell - Euclid's Elements - 1837 - 290 pages
...at the point of their intersection, are together equal to four right angles. Con. 2. — And hence, all the angles made by any number of lines meeting...one point, are together equal to four right angles. PROPOSITION XVI. THEOREM. If one side of a triangle be produced, the exterior angle is greater than... | |
 | Euclides - 1838 - 264 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. PROP. XIV. THEOR. If, at a point in a straight lins, two other straight lines, upon the opposite sides... | |
 | Chambers W. and R., ltd - 1842 - 744 pages
...adjoining squares, and no part of the board between the squares is left uncovered. The reason of this is, that all the angles made by any number of lines meeting...one point, are together equal to four right angles, or to 360 degrees ; and that, therefore, if it be required to lay any number of figures together, so... | |
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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. 
