 | 1801 - 658 sider
...;• add all the inward angles A, B, C, &c. together, and when the work is right, their sum will be equal to twice as many right angles, as the figure has sides, wanting four right angles. And when there is an angle, as F, that bends inward, and you measure the... | |
 | John Playfair, Euclid - 1804 - 468 sider
...interior angles of any reftilineal figure are equal to twice as many right angles as the figure has fides, wanting four. For all the angles exterior and interior...equal to twice as many right angles as the figure has fides; but the exterior are equal to four right angles ; therefore the interior are equal to twice... | |
 | Robert Simson - 1804 - 530 sider
...Q^ED . CoR. i. All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has fides. For any reCtilineal figure ABCDE can be divided into as many triangles as the figure has fides,... | |
 | John Playfair - 1806 - 320 sider
...ACB ; therefore if ACB be taken from both, the angle ACD is equal to the two angles CAB, ABC. COR. 3. The interior angles of any rectilineal .figure...twice as many right angles as the figure has sides, and the exterior are equal to four right angles ; therefore the interior are equal to twice as many... | |
 | Robert Simson - 1806 - 546 sider
...gether with four right angles. Therefore all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides. CoR. 2. All the exterior angles of any rectilineal figure, are together equal to four right angles.... | |
 | Charles Hutton - 1807 - 464 sider
...work ; add all the inward angles A, B, c, &c, together ; for when the work is right, their sum will ba equal to twice as many right angles as the figure has sides, wanting 4 right angles. But when there is an angle, as F, that bends inwards, and you measure the external... | |
 | Sir John Leslie - 1809 - 542 sider
...AED, is equal to two right angles. All the exterior angles therefore, added to the interior angles, are equal to twice as many right angles as the figure has sides. Consequently the exterior angles are equal to the four right angles which, by the last Proposition,... | |
 | Sir John Leslie - 1809 - 522 sider
...is equal to two right angles. All the exterior angles therefore, added to the interior angles, ftre equal to twice as many right angles as the figure has sides. Consequently the exterior angles are equal to the four right angles which, by the last Proposition,... | |
 | Charles Hutton - 1811 - 406 sider
...triangles, is equal to two right angles (th. 17); therefore the sum of the angles of all the triangles is equal to twice as many right angles as the figure has sides. But the sum of all the angles about the point P, which are so many many of the angles of the triangles, but... | |
 | Charles Hutton - 1812 - 620 sider
...intvard angles, as the figure has sides : therefore the sum of all the inward and outward angles, is equal to twice as many right angles as the figure has sides. But the sum of all the inward angles, with four right angles, is equal to twice as many right angles as the... | |
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All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides. 
