| Euclides - 1852 - 152 pages
...1. All the interior angles of any rectilinear figure, BOOK I. together with four right angles, are **equal to twice as many right angles as the figure has sides.** For any rectilinear figure ABODE can be divided into as many triangles as the figure has sides, by... | |
| Euclid - Geometry - 1853 - 176 pages
...rectilinear. Idem • . CONSEQUENCES. The sum of all the internal {angles, together with four right angles, **is equal to twice as many right angles as the figure has sides.** {All its external angles are together equal to four right angles. L. Relative to Circles generally.... | |
| Euclides - 1853 - 146 pages
...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.** COK. 2. — All the exterior angles of any rectilineal figure are together equal to four right angles.... | |
| Euclides - 1853 - 176 pages
...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.** Сод. 2. All the exterior angles of any rectilineal figure are together equal to four right ,ingles.... | |
| Royal Military Academy, Woolwich - Mathematics - 1853 - 400 pages
...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.... | |
| Charles Davies - Geometry - 1854 - 436 pages
...is equal to the angle B, and the other part DAE is equal to the angle C. PROPOSITION XXVI. THEOREM. **The sum of all the interior angles of a polygon, is equal to twice as many right angles,** less four, as the figure has sides. Let ABCDE be any polygon : then will the sum of its interior angles... | |
| E. W. Beans - Surveying - 1854 - 114 pages
...taken. If the entire survey has been made as above directed, the sum of all the internal angles will be **equal to twice as many right angles as the figure has sides,** diminished by four right angles. If this sum, as in practice will be likely to be the case, should... | |
| Thomas Holloway (surveyor.) - 1881 - 132 pages
...degrees. 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.** Although further systems of proof could easily be quoted, I consider the foregoing quite sufficient... | |
| John Gibson - 1881 - 302 pages
...opposite to it. 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.** 4. Describe a parallelogram that shall be equal to a given triangle BCD, and have one of its angles... | |
| Thomas Newton Andrews - Geometry - 1881 - 168 pages
...proved 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."** If we have to describe a pentagon on the base AB, we must first calculate the angles at the base. Thus... | |
| |