| Euclides - 1841 - 351 sider
...is equal* to the £"" * 3. 1. angle GDB : but when a straight line, standing upon another straight **line, makes the adjacent angles equal to one another, each of the angles is** a right* angle: *iODef. therefore the angle GDB is a right angle : but FDB *' is likewise a right angle;... | |
| Euclides - 1842
...angle ADG is equal (8. 1.) to the angle GDB. But when a straight line standing upon another straight **line makes the adjacent angles equal to one another, each of the angles is** a right angle (lO.Def. 1.); therefore the angle GDB is a right angle : but FD в is likewise a right... | |
| John Playfair - 1842 - 317 sider
...angle ADG is equal (8. 1.) to the angle GDB : But when a straight line standing upon another straight **line makes the adjacent angles equal to one another, each of the angles is** a right angle (7. def. 1.) Therefore the angle GDB is a right angle: But FDB is likewise a right angle:... | |
| William Pease - 1843 - 68 sider
...the intersection of two of its great circles. X. When a straight line standing on another straight **line, makes the adjacent angles equal to one another,...each of the angles is called a right angle ; and the** straight line which stands on the other is called a perpendicular to it. Beginners are apt to suppose... | |
| Philip Kelland - 1843 - 147 sider
...centre is the angular point, as trigonometers often make it. 7. When a straight line standing on another **makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the** straight line which stands on the other is called a perpendicular to it. By looking over the propositions... | |
| Scottish school-book assoc - 1845
...called simply the »ngle at E, PLANE GEOMETRY. 9. When a straight line standing on another straight **line makes the adjacent angles equal to one another,...each of the angles is called a right angle; and the** strnight line which stands on the other is called a perpendicular to it. 10. An obtuse angle is that... | |
| Euclides - 1845
...angle ADG is equal to the angle GDB: (i. 8.) but when a straight line standing upon another straight **line makes the adjacent angles equal to one another, each of the angles is** a right angle; (i. def. 10.) therefore the angle GDB is a right angle : but FDB is likewise a right... | |
| Euclid - 1845 - 199 sider
...ADGisequalJ to the angle GDB : but ~ ^J£^.." t i. .. when a straight line standing upon another straight **line makes the adjacent angles equal to one another, each of the angles is** a right angle ||; therefore I! 10. Def the angle GDB is a right angle : But FDB is likewise a§ right... | |
| Euclid, John Playfair - 1846 - 317 sider
...angle ADG is equal (8. 1.) to the angle GDB : But when a straight line standing upon another straight **line makes the adjacent angles equal to one another, each of the angles is** a right angle (7. def. 1.) Therefore the angle GDB is a right angle : But FDB is likewise a right angle... | |
| Euclides - 1847
...Definition 18. 10. When a straight line, standing on another straight line, makes the adjacent an. gles **equal to one another, each of the angles is called a right angle; and the** straight line which stands on the other is called a perpendicular to it. 11. An obtuse angle is that... | |
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