| Thomas Curtis (of Grove house sch, Islington)
...twice u_. 118 119 m.iti) right angles as the figure has sides. Hence (he interior angles of the figure **are equal to twice as many right angles as the figure has sides wanting four** right angles. Car. I. All the interior angle* of a quadrilateral figure are together equal to four... | |
| Thomas Curtis - 1829
...figure В С DE ; and the interior angles of that figure, together with four right angles, being also **equal to twice as many right angles as the figure has sides** (Theorem XX.), the angles of the triangles are equal to the interior angles of the plane figure and... | |
| John Playfair - 1829 - 186 sider
...xr = (n— 2) x 2r, that is, all the interior angles of any convex rectilineal figure are together **equal to twice as many right angles as the figure has sides** less two sides. " Es. PROPOSITION M. THEOREM. All the exterior angles of any convex rectilineal figure,... | |
| Pierce Morton - 1830 - 272 sider
...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 - 1832 - 333 sider
...and the exterior being equal to four right angles, the interior are equal to two right angles. COB. **2. An exterior angle of any triangle is equal to the...straight lines, which make with a third line the interior** ancles on the same side of it less than two right angles, will meet on that side, if produced far enough.... | |
| John Playfair - 1833 - 333 sider
...wanting four. For all the smiles exterior and interior are equal to twice as many right angles as th» **figure has sides; but the exterior are equal to four...equal to twice as many right an>gles as the figure** baa sides, wanting four. PROP. II. Two straight lines, which make with a third line the interior 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'... | |
| Euclid - 1833 - 183 sider
...to four right angles (2); and therefore the angles of the figure, together with four right angles, **are equal to twice as many right angles as the figure has sides.** Cor. 7. The external angles of any rectilineal figure are together equal to four right angles. For... | |
| 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... | |
| 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 the figure... | |
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