| Euclid - 1826 - 180 sider
...are right lines, it is called a rectilineal angle. 10. When a right line standing on another right **line, makes the adjacent angles equal to one another, each of the** equal angles is a right angle, and the right line standing on the other is called a perpendicular.... | |
| Euclides - 1826
...are right lines, it is called a rectilineal angle. 10. When a right line standing on another right **line, makes the adjacent angles equal to one another, each of the** equal angles is a right angle, and the right Tine standing on the other is called a perpendicular.... | |
| Robert Simson - 1827 - 513 sider
...letter placed at that point : as the angle at E.' 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. XL An obtuse angle is that... | |
| Thomas Curtis - 1829
...the angle contained by the line С В and DB. 7. 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. Fig. 4. 8. An OBTUSE ANGLE is that... | |
| Thomas Perronet Thompson - 1833 - 150 sider
...is always the direct angle that is meant. XXXVII. 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 ; and is also said to be at... | |
| Euclid - 1835 - 513 sider
...the angle ADG is equal0 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 :d Therefore the angle GDB is a right angle: But FDB is likewise a right angle; wherefore... | |
| 1836 - 472 sider
...together but are not in the same straight line. 7. 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. 8. An obtuse angle is that... | |
| John Playfair - 1836 - 114 sider
...angle ADG is equal (7. 1.) to the angle BDG ; 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 (Def. 27. 1.); therefore BDG is a right angle ; but BDF is likewise a right angle ; wherefore... | |
| Euclid, James Thomson - 1837 - 390 sider
...lines meet is called the vertex of the angle. 8. 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, and is said to be at right... | |
| Euclides - 1838
...letter placed at that point; as the angle at E.VIII. 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 lines are said to be perpendicular to each other. IX. An obtuse angle is that which is greater... | |
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