| Alexander Ingram - Trigonometry - 1799 - 374 pages
...which is the common vertex of the triangles ; that is *, together with four right angles. Therefore all the angles of the figure, together with four right...equal to twice as many right angles as the figure has fides. COR. 2. All the exterior angles of any reftilineal figure, are together equal to four right... | |
| Mathematics - 1801 - 658 pages
...;• 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... | |
| Robert Simson - Trigonometry - 1804 - 530 pages
...which is the common Vertex of the triangles; that is », 1' together with four right angles. Therefore all the angles of the figure, together with four right angles, are equal to twice as manyright angles as the figure has fides. CoR. 2. All the exterior angles of any rectilineal figure... | |
| John Playfair, Euclid - Circle-squaring - 1804 - 468 pages
...right angles as there are triangles b ; that is, as there are fides in the figure BCDEF ; and becaufe all the angles of the figure, .together with four right angles, are likewise equal to twice as many right angles as there are fides in the c i. cor. figure c ; therefore... | |
| Robert Simson - Trigonometry - 1806 - 546 pages
...angles. Wherefore, if a side of a triangle, &c. QE D, CoR. 1 . All the interior angles of any rectilineal figure, together with four right angles, are equal...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, by... | |
| John Playfair - Mathematics - 1806 - 320 pages
...to all the angles of the figure, together with four right angles, that is, the angles of the figure are equal to twice as many right angles as the figure has sides, wanting four. COR. 2. All the exterior angles of any rectilineal figure are together equal to four... | |
| Charles Hutton - Mathematics - 1807 - 464 pages
...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 - Geometry, Analytic - 1809 - 542 pages
...interior one 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 - Geometry, Plane - 1809 - 522 pages
...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,... | |
| Euclid - Geometry - 1810 - 554 pages
...which is the common vertex of the triangles: that is », together with four right angles. Therefore all the angles of the figure, together with four right...twice as many right angles as the figure has sides. Con. 2. All the exterior angles of any rectilineal figure, are .together equal to four right angles.... | |
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