 | Robert Rawson - 1856 - 178 σελίδες
...expressed by a letter placed at that point ; as the angle at E." 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... | |
 | W.E. WORTHEN - 1857 - 600 σελίδες
...expressed by a letter placed at that point; as the angle at E.' 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... | |
 | William Ezra Worthen - 1857 - 632 σελίδες
...expressed by a letter placed at that point ; as the angle at E.' When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a rig fit angle ; and the straight lines are said to be perpendicular to each... | |
 | Elias Loomis - 1858 - 256 σελίδες
...angle ECD is the difference between the two angles BCD, BCE. 10. When a straight line, meeting another straight line, makes the adjacent angles equal to one another, each of them is called a right angle, and the straight line which meets the other is called a perpendicular to it.... | |
 | Popular educator - 1860 - 536 σελίδες
...(I. 4) to the angle CBO ; and they are adjacent angles. But when a straight line standing on another straight line makes the adjacent angles equal to one...which stands upon the other is called a perpendicular (l)'f. 10) to it. Therefore from the given point oa perpendicular CH has been drawn to the given straight... | |
 | Robert Potts - 1860 - 380 σελίδες
...therefore the 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... | |
 | William Schofield Binns - 1861 - 238 σελίδες
...another, meeting or cutting each other in a point, as c (10) " 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... | |
 | Elias Loomis - 1861 - 244 σελίδες
...difference between the two angles BCD, BCE. 10. When a straight line, meeting another straight lin® makes the adjacent angles equal to one another, each of them is called a right angle, and the straight line which meets the other is called a perpendicular to it.... | |
 | Euclides - 1862 - 172 σελίδες
...angle ADG must be equal to the angle GDB ; (L, 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 must be a right angle ; but FOB... | |
 | Euclides - 1863 - 122 σελίδες
...Therefore the angle ADG is equal (I. 8) to the angle GDB. But when a straight line standing upon another straight line makes the adjacent angles equal to one another, each of these angles is a right angle (I. Def. 10). Therefore the angle GDB is a right angle. But FDB is likewise... | |
| |
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. 
