| Charles Hutton - 1811
...triangles, is equal to two right angles (th. 17); therefore 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, which are so many many of the angles of the triangles,... | |
| Euclides - 1814
...the same angles are equal to the angles of the figure, together with the angles at the point F, which **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.... | |
| Euclides - 1816 - 528 páginas
...anglesat the point F, which , "2 Cor. is the common vertex of the triangles : that is a, together is. 1. **with four right angles. Therefore all the angles of...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.... | |
| John Playfair - 1819 - 333 páginas
...to all the angles of the figure, together with four right angles, that is, the angles of the figure **are equal to twice as many right angles as the figure has sides,** wanting four. COR. 2. All the exterior angles of any rectilineal figure are tegether equal to four... | |
| Euclid - 1822 - 179 páginas
...therefore equal to B AE and EAC. Cor. 6. All the internal angles of any rectilineal figure, ABCDE, **together with four right angles, are equal to twice as many right angles as the figure has sides.** Take any point F within the figure and draw the right lines FA, FB, FC, FD, and FE. There are formed... | |
| Rev. John Allen - 1822 - 494 páginas
...as many right angles, except four, as the figure has sides ; and all tbe angles of these triangles **are equal to twice as many right angles as the figure has sides** (32. 1 /CM.), therefore the angles of these triangles which are at their common vertex A, being those... | |
| Euclid, Rev. John Allen - 1822 - 494 páginas
...two right angles [13. 1} ; therefore all the exterior and interior angles of the figure are together **equal to twice as many right angles as the figure has sides** ; but the interior angles are equal to twice as many right angles, except four, as the figure has sides... | |
| Charles Hutton - 1822
...triangles, is equal to two right angles (th. 17) ; therefore 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, which are so / many of the angles of the triangles,... | |
| Edward Riddle - 1824 - 551 páginas
...twice as many right angles as the figure has sides ; or the interior angles of the figure, themselves, **are equal to twice as many right angles as the figure has sides,** wanting four right angles. QED Cor. 1. All the interior angles of any quadrilateral figure are together... | |
| Peter Nicholson - 1825 - 372 páginas
...Wherefore if a aide of a triangle, &c. QE I). Cor. 1 . All the interior angles of any rectilínea] **figure, together with four right angles, are equal...twice as many right angles as the figure has sides.** For any rectilineal figure ABCDE can be divided into as many triangles as the figure has sides, by... | |
| |