| Euclid - 1833 - 183 sider
...and therefore equal to BAE 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... | |
| John Playfair - 1833 - 333 sider
...angles of the figure are equal to twice as many right angles as the figure has sides, wanting four. Con. **2. All the exterior angles of any rectilineal figure are together equal to four right angles.** Because every interior angle ABC, with its adjacent exterior ABD, is equal (13. 1.) to two right angles... | |
| Thomas Perronet Thompson - 1833 - 150 sider
...isf equal to two right angles ; all the interior together with all the exterior angles of the figure, **are equal to twice as many right angles as the figure has sides.** But (by Cor. 1 .) all the interior angles are together equal to twice as many right angles as the figure'... | |
| Euclides - 1834
...Therefore all the • 2 Cor. angles of the figure, together with four right angles, are equal 15. l. **to twice as many right angles as the figure has sides....rectilineal figure are together equal to four right angles.** Because every interior angle ABC, with its adjacent exterior ABD, is equal* to two right angles, there-... | |
| Charles Bonnycastle - 1834 - 631 sider
...expressed as the following proposition : "The interior angles of any closed plane figure are together **equal to twice as many right angles as the figure has sides,** minus four right angles." 206. And as a second application of the principle in question, or, which... | |
| Euclid - 1835 - 513 sider
...angles. Wherefore, " if a side of a triangle," &c. QED COR. 1. All the interior angles of any rectilineal **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... | |
| 1835
...angle, is equal to two right angles (2.) ; all the interior angles, together with all the exterior **angles, are equal to twice as many right angles as the figure has** angles. But all the exterior angles are, by the former part of the proposition, equal to four right... | |
| John Playfair - 1835 - 316 sider
...by -f of one right angle. PROP. XXVI. THEOR. All the interior angles of any rectilineal figure, art **equal to twice as many right angles as the figure has sides,** wanting four right angles. For any rectilineal figure ABCDE can be divided into as many triangles as... | |
| John Playfair - 1836 - 114 sider
...equal to two right angles. Which was to be proved. COR. I. All the interior angles of any rectilineal **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... | |
| 1836 - 472 sider
...triangle are equal to two right angles. Сон. 1. All the interior angles of any rectilineal figure **are equal to twice as many right angles as the figure has sides,** wanting four right angles» 2. All the exterior angles of any rectilineal figure are to. gether equal... | |
| |