| Stewart W. and co - 1884
...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.** XXXIII. — The straight lines which join the extremities of two equal and parallel straight lines,... | |
| Palaestra Oxoniensis - 1884
...angles. (б) 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.** (6) All the exterior angles of any rectilineal figure are together equal to four right angles. (7)... | |
| 1885
...that the sum of the interior angles of any rectilineal figure together witli four right angles, is **equal to twice as many right angles as the figure has sides.** 5. Prove that the opposite sides and angles of a parallelogram are equal to one another, and that the... | |
| Charles Davies, Adrien Marie Legendre - Geometry - 1885 - 512 pages
...eight right angles, or $ of one right angle. Cor. 4. In any equiangular polygon, any interior angle is **equal to twice as many right angles as the figure has sides,** less four right angles, divided by the mimber of angles. PROPOSITION XXVII. THEOREM. The sum of the... | |
| William Davis Haskoll - Hydrographic surveying - 1886 - 230 pages
...proof of the angles having been correctly measured, because all the interior angles of the polygon **will be equal to twice as many right angles as the figure has sides,** less four right angles, or 360°, if the theodolite has been correctly used. There will, however, generally... | |
| Webster Wells - Geometry - 1886 - 371 pages
...angles is expressed by 2 R x (n — 2) , or 2 nR — 4 R. That is, the sum of the angles of a polygon is **equal to twice as many right angles as the figure, has sides,** less four right angles. PROPOSITION XLVII. THEOREM. 149. If the sides of a polygon are produced so... | |
| Richard Anthony Proctor - Geometry - 1887 - 180 pages
...produced to meet, the angles formed by these lines, together with eight right angles, are together **equal to twice as many right angles as the figure has sides.** 139. AP, BP, and CP are the internal bisectors of the angles of the triangle ABC. AP is produced to... | |
| Bennett Hooper Brough - Mine surveying - 1888 - 302 pages
...accuracy of the survey, as the interior angles of the polygon together with four right angles should **be equal to twice as many right angles as the figure has sides.** The interior angles of a traverse may be found from the bearings or courses by the following rules... | |
| E. J. Brooksmith - Mathematics - 1889
...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.** There are two regular polygons, the number of sides of one is double the number of sides of the other,... | |
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