| Great Britain. Committee on Education - 1850 - 914 pages
...Section I. 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.** 2. If the square described upon one side of a triangle be equal to the sum of the squares described... | |
| 1850 - 524 pages
...proposition that all the interior angles of any rectilinear figure, together with four right angles, are **equal to twice as many right angles as the figure has sides** : and the dictum is equally true, too, in moral science — only in any particular case to dogmatize... | |
| sir Henry Yule - 1851 - 282 pages
...angle of any polygon may be found from the property of such figures, that the sum of the angles of any **polygon is equal to twice as many right angles as the figure has sides,** less four. The following technical terms require explanation : — A Salient Angle is one directed... | |
| Sir Henry Edward Landor Thuillier - Surveying - 1851 - 828 pages
...has sides" or in other words that — In any rectilineal figure, the sum of all the interior angles, **is equal to twice as many right angles as the figure has sides,** less four right angles. This forms the basis on which the Revenue Survey operations in India are conducted.... | |
| Janet Taylor - Nautical astronomy - 1851 - 702 pages
...being the two angles made by cne line meeting another. The sum of all the outward and inward angles, **is equal to twice as many right angles as the figure has sides;** but the sum of all the inward angles is equal to twice as man1 right angles as the figure has sides,... | |
| Frederick Overman - Building - 1851 - 454 pages
...four internal angles of any quadrilateral figure is equal to four right angles. The sum of all the **angles of a polygon is equal to twice as many right angles,** less four, as the polygon has sides. The sum of the external angles of a polygon is equal to four right... | |
| John William Colenso (bp. of Natal.) - 1851 - 382 pages
...Cor. 1, that ' 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.'** Hence if и be the number of sides of any rectilineal figure, we have the sum of its n angles + 4 x... | |
| Adrien Marie Legendre - Geometry - 1852 - 436 pages
...angle B, and the other part DAE is equal to the angle 0. PROPOSITTON XXVI. THEOEEM. The sum of oil **the interior angles of a polygon, is equal to twice as many right angles,** less four, as the figure has sides. A+B+C+D+fi be equal to twice .as many right angles, less four,... | |
| Charles Davies - Geometry - 1886 - 340 pages
...triangles is equal to two right angles (Th. xvii) : hence, 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 is equal to four right angles (Th. ii. Cor. 4) ; and... | |
| Euclides - 1852 - 48 pages
...base. COB. 3. 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.** COB. 4. All the exterior angles of any rectilineal figure are together equal to four right angles.... | |
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