| Mathematics - 1801
...;• 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 external angle, which is less... | |
| Robert Simson - Trigonometry - 1804
...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,... | |
| Robert Simson - Trigonometry - 1806 - 518 pages
...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.... | |
| John Playfair - Euclid's Elements - 1806 - 311 pages
...as many right angles as the figure has sides, wanting four. For all the angles exterior and interior **are equal to 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... | |
| Charles Hutton - Mathematics - 1807
...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 - 524 pages
...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 - 493 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,... | |
| Charles Hutton - Mathematics - 1811
...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,... | |
| Charles Hutton - Mathematics - 1812
...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... | |
| Euclides - 1816 - 528 pages
...&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, by... | |
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