| Euclid, Robert Simson - 1838 - 416 sider
...with the angles at the point F, which is the common vertex of the triangles : that is, (2 Cor. 15. 1.) **together with four right angles. Therefore all the...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... | |
| Euclides - 1840
...two right angles. All the angles, therefore, of the triangles into which the AE figure is divided, **are equal to twice as many right angles as the figure has** sides. But of these, the angles round the point F are equal to four right angles (Prop. 13, cor.) :... | |
| Euclides - 1841 - 351 sider
...angles. Wherefore, if a side of a triangle, &c. QED COR. 1. 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. For any rectilineal figure ABCDE can be divided into as many triangles as the figure has sides,... | |
| Euclides - 1842
...as there are triangles (Euc. 32. 1.); that is, as there are sides in the figure BCDEF; and because **all the angles of the figure, together with four right angles, are** likewise equal to twice as many right angles as there are sides in the figure (Euc. 1. Cor. 32. 1.);... | |
| John Playfair - 1842 - 317 sider
...angles as there are triangles (32. 1.) » that is, as there are sides in the figure BCDEF ; and because **all the angles of the figure, together with four right angles, are** likewise equal to twice as many right angles as there are sides in the figure(l cr. 32. 1 .^therefore... | |
| Euclid - 1845 - 199 sider
...angles at the point F, which is the common vertex of the triangles ; that is, IT together * *5c°r. **with four right angles. Therefore all the. angles...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.... | |
| Euclides - 1845
...that the angles of the triangles are equal to twice as many right angles as the figure has sides ; **therefore all the angles of the figure together with...equal to twice as many right angles as the figure has** sides. COR. 2. All the exterior angles of any rectilineal figure, made by producing the sides successively... | |
| Euclid, James Thomson - 1845 - 352 sider
...as there are triangles ; that is, as there are sides in the figure BCDEF ; and that (I. 32, cor. 1) **all the angles of the figure, together with four right angles, are** likewise equal to twice as many right angles as there are sides in the figure ; therefore all the angles... | |
| Euclides - 1846
...with the angles at the point F, that is, together with four right angles (1. 15, Cor. 2) : "Wherefore **all the angles of the figure, together with four right...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.... | |
| Dennis M'Curdy - 1846 - 138 sider
...ax. 2 ! (4) p. 27; (c) p. 13. (e)p.29; Cor. 1. All the interior angles of any rectilineal figure and **four right angles, are equal to twice as many right angles as the figure has** sides. For, about a point within the figure, as many triangles may be formed as the figure has sides,... | |
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