| C. F. Close - Surveying - 1905 - 376 pages
...together with the line AB form an enclosed figure, and the sum of all the interior angles should be **equal to twice as many right angles as the figure has sides,** less four right angles. We thus have a check on the observed horizontal angles. It should be carefully... | |
| Saskatchewan. Department of Education - Education - 1906 - 188 pages
...? Show 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.** (c) Derive the magnitude of an angle of a regular octagon. (d) If the exterior vertical angle of an... | |
| Royal Geographical Society (Great Britain) - Scientific expeditions - 1906 - 512 pages
...together with the line AB form an enclosed figure, then the sum of all the interior angles should be **equal to twice as many right angles as the figure has sides,** less four right angles. We thus have a check on the observed horizontal angles. It should be carefully... | |
| Walter Percy Workman - Geometry - 1908 - 228 pages
...together equal to four right angles ; and in any convex polygon the sum of the interior angles, together **with four right angles, is equal to twice as many right angles as the figure has sides** (Euc. I. 32, Cor.) 110 Congruence. CI — If two triangles have two sides and the included angle in... | |
| Euclid - Mathematics, Greek - 1908 - 550 pages
...perhaps somewhat simpler than, Simson's. 1. The sum of the interior angles of a convex rectilineal figure **is equal to twice as many right angles as the figure has sides,** less four. For let one angular point A be joined to all the other angular points with which it is not... | |
| Henry Sinclair Hall - 1908 - 286 pages
...42 COR. 1. All the interior angles of any rectilineal figure, 2 together with four right angles, are **equal to twice as many right angles as the figure has sides.** 44 COR. 2. If the sides of a rectilineal figure, which has no re-entrant angle, are produced in order,... | |
| Euclid - Mathematics, Greek - 1908 - 576 pages
...assume the proposition that the interior angles of a convex polygon together with four right angles are **equal to twice as many right angles as the figure has sides.** Let there be any convex polyhedral angle with V as vertex, and let it be cut by any plane meeting its... | |
| Charles E. Larard, Henry A. Golding - Engineering - 1909 - 558 pages
...right angles. = 180' (fig. 2). FIG. 1. FIG. 2. The sum of the interior angles of any rectilineal figure **is equal to twice as many right angles as the figure has sides,** less 4. Thus, for example, in the irregular pentagon (fig. 3), = 2 x 5 x 90° - 4 x 90° ; FIG. 3.... | |
| Geometry, Plane - 1911 - 192 pages
...triangle whose altitude is 3 inches. SEPTEMBER, 1909 1. The sum of all the interior angles of any polygon **is equal to twice as many right angles as the figure has sides,** less four right angles. 2. The angle between two chords which intersect within a circle is measured... | |
| Surveying - 1911 - 336 pages
...close jK,lygon, which may be summarised as follows. The sum of the ' interior' angles augmented by **four right angles is equal to twice as many right angles as** i 'he figure has sides. The sum of the ' exterior ' angles diminished by four right angles is equal... | |
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