 | Henry Sinclair Hall - 1908 - 286 pagina’s
...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,... | |
 | Walter Percy Workman - 1908 - 228 pagina’s
...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... | |
 | Charles E. Larard, Henry A. Golding - 1909 - 556 pagina’s
...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.... | |
 | 1911 - 192 pagina’s
...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... | |
 | Alberta. Department of Education - 1912 - 244 pagina’s
...8. Prove 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. 8 9. (a) If a straight line be bisected and produced to any point, the rectangle contained by the whole... | |
 | Great Britain. Board of Education - 1912 - 1044 pagina’s
...BC. 2. Prove that 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. Find the number of sides of a regular polygon, each angle of which is equal to the sum of an angle... | |
 | Great Britain. Board of Education - 1912 - 632 pagina’s
...BC. 2. Prove that 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. Find the number of sides of a regular polygon, each angle of which is equal to the sum of an angle... | |
 | William Charles Popplewell - 1915 - 268 pagina’s
...Stated precisely, " the sum of all the internal angles of a closed polygon plus four right angles is equal to twice as many right angles as the figure has sides." So that it is easy from the field notes to find the internal angle at each corner of the figure, and... | |
 | Alfred Hubert Haines, A. F. Hood Daniel - 1915 - 360 pagina’s
...right always, when possible, with the theodolite. of the exterior angles minus four right angles ia equal to twice as many right angles as the figure has sides. We thus have a check upon the angles of the traverse. Set up and level the theodolite at the station... | |
 | John Whitelaw - 1916 - 582 pagina’s
...measurements before leaving the ground, as " the sum of the interior angles of any rectilinear figure is equal to twice as many right angles as the figure has sides, less four right angles." In the case of Fig. 73, as the figure is four-sided the sum of the interior... | |
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Therefore all the interior angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides. 
