| Euclid - 1835 - 513 sider
...&c. QED COR. 1. 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.** For any rectilineal figure ABCDE can be divided into as many triangles as the figure has sides, by... | |
| 1835
...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 - 1836 - 471 sider
...the angles CAB, ABC, BCA are equal to two right angles ; and the angles ACD, ACB are also (13. I.) **equal to two right angles; therefore the three angles...the figure has sides, wanting four, \ ' PROP. II.** , .. I . i'! ' Two straight lines, which make with a third line the interior angles on the same side... | |
| 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 to four right... | |
| John Playfair - 1836 - 114 sider
...proved. COR. I. 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.** For any rectilineal figure ABCDE can be divided into as many triangles as the figure has sides, by... | |
| Adrien Marie Legendre - 1837 - 359 sider
...two right angles, taken as many times, less two, as the polygon has sides (Prop. XXVI.) ; that is, **equal to twice as many right angles as the figure has sides, wanting four** right angles. Hence, the interior angles plus four right angles, is equal to twice as many right angles... | |
| Commissioners of National Education in Ireland - 1837
...you go along, as also the angles. angles, A, B, C, &c. of the figure together, and their sum must be **equal to twice as many right angles as the figure has sides, wanting four** right angles. But when the figure has a re-enterant angle, as F, measure the external angle, which... | |
| Euclid, James Thomson - 1837 - 390 sider
...side, &c. Cor. 1. 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.** For any rectilineal figure ABCDE can be divided into as many triangles as the figure has sides, by... | |
| Charles Reiner - 1837 - 215 sider
...vertex of these triangles = 4 rt. /.s; therefore, the sum 01 the interior angles of any polygon is **equal to twice as many right angles as the figure has sides** less [minus] four. M.—If the number of sides be three, four, five, six, seven, &c., what is the sum... | |
| Andrew Bell - 1837 - 240 sider
...angles. COR. 1. — 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** be divided into as many triangles as the figure has sides, by drawing straight lines from a point F... | |
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