 | 1835 - 684 σελίδες
...always denotes the angular point. 10. (Eue. i. det 10.) When a straight line standing; upon another straight line makes the adjacent angles equal to one another, each of them is called a right angle, and the straight line which stands upon the other is called a perpendicular to... | |
 | Euclid - 1835 - 540 σελίδες
...Therefore 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... | |
 | John Playfair - 1836 - 148 σελίδες
...therefore the 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... | |
 | John Playfair - 1836 - 488 σελίδες
...therefore the angle AFE is equal b to theangle BFE. And when a straight line standing upon another maRes the adjacent angles equal to one another, each of them is a rip-ht" angle : Therefore each of the angles AFE, BFE is a right angle ; wherefore the straight line... | |
 | 1836 - 488 σελίδες
...which meet 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... | |
 | George Darley - 1836 - 172 σελίδες
...the adjacent angles equal to one another, each of these angles is called a right angle, and the right line which stands upon the other is called a perpendicular to it. the right line AB, and make the angles ADB CDA, CDB equal to one another, each of these angles is called... | |
 | Charles Reiner - 1837 - 254 σελίδες
...there are three plane angles about each of its solid angles. 3 — When one line. standing on another line makes the adjacent angles equal to one another, each of them is called a right angle. 4. — An angle which is greater than a right angle is called an obtuse angle.... | |
 | Euclid, James Thomson - 1837 - 410 σελίδες
...straight 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... | |
 | Robert Simson - 1838 - 434 σελίδες
...therefore the angle AFE is equal (8. lJ to the angle BFE: but when a straight line standing upon another makes the adjacent angles equal to one another, each of them is a right (10 def.) angle: therefore each of the angles AFE, BFE is a right angle ; wherefore the straight line... | |
 | Euclides - 1838 - 264 σελίδες
...by a 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.... | |
| |
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. 
