| Pierce Morton - 1830 - 272 Seiten
...four right angles ; and the. figure has as many angles as sides : therefore all the interior angles **together with four right angles are equal to twice as many right angles as the figure has** sides. Therefore, Sty. Cor. The four angles of a quadrilateral are together equal to four right angles.... | |
| Euclid - 1833 - 183 Seiten
...figure has sides (1): but the angles at the point F are equal to four right angles (2); and therefore **the angles of the figure, together with four right...equal to twice as many right angles as the figure has** sides. Cor. 7. The external angles of any rectilineal figure are together equal to four right angles.... | |
| Thomas Perronet Thompson - 1833 - 150 Seiten
...isf equal to two right angles ; all the interior together with all the exterior angles of the figure, **are equal to twice as many right angles as the figure has** sides. But (by Cor. 1 .) all the interior angles are together equal to twice as many right angles as... | |
| Euclid - 1835 - 513 Seiten
...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,... | |
| 1835
...angles of any rectilineal figure are together equal to four right angles : and all the interior angles, **together with four right angles, are equal to twice as many right angles as the figure has** sides. For, if from any point in the same plane, straight lines be drawn, one after the other, parallel... | |
| John Playfair - 1836 - 114 Seiten
...with the angles at the point F which is the common vertex of the triangles ; that is (Cor. 2. 3. 1.), **together with four right angles. Therefore all the...equal to twice as many right angles as the figure has** sides. COR. II. All the exterior angles of any rectilineal figure are together equal to four right... | |
| 1836 - 472 Seiten
...triangle are equal to two right angles. Сон. 1. All the interior angles of any rectilineal figure **are equal to twice as many right angles as the figure has** sides, wanting four right angles» 2. All the exterior angles of any rectilineal figure are to. gether... | |
| Andrew Bell - 1837 - 240 Seiten
...with the angles at the point F, which is the common vertex of the triangles ; that is (1. 15, Cor. 2), **together with four right angles. Therefore all the...equal to twice as many right angles as the figure has** sides. Let the sum of the interior angles be denoted by I, the number of sides by n, and a right angle... | |
| Euclid, James Thomson - 1837 - 390 Seiten
...° 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 - 1838
...the figure, together with the angles at the point F, which is the common vertex of «2cor is i "le **triangles; that is,* together with four right angles....equal to twice as many right angles as the figure has** sides. COB. 2. — All the exterior angles of any rectilineal figure are together equal to four right... | |
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