 | W.E. WORTHEN - 1857 - 600 Seiten
...only one angle at a point, it may be expressed by a letter placed at that point; as the angle at E.' When a straight line standing on another straight...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 - 650 Seiten
...only one angle at a point, it may be expressed by a letter placed at that point ; as the angle at E.' When a straight line standing on another straight...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... | |
 | Elias Loomis - 1858 - 256 Seiten
...the 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... | |
 | Popular educator - 1860 - 536 Seiten
...equal to the base OH, and the angle CHF (I. 4) to the angle CBO ; and they are adjacent angles. But when a straight line standing on another straight...the adjacent angles equal to one another, each of them is a right angle, and the straight line which stands upon the other is called a perpendicular... | |
 | Robert Potts - 1860 - 380 Seiten
...15.) therefore the angle FHC is equal to the angle GHC; (I. 8.) and these are adjacent angles. But when a straight line standing on another straight...the adjacent angles equal to one another, each of them is a right angle, and the straight line which stands upon the other is called a perpendicular... | |
 | William Schofield Binns - 1861 - 238 Seiten
...inclination of two straight lines to one another, meeting or cutting each other in a point, as c (10) " When a straight line standing on another straight...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... | |
 | Janes Boddely Keene - 1861 - 104 Seiten
...the angle. Plate I., Fig. 1. 10. Angles are of three kinds. Fig. 2. a. The Right Angle. — If one straight line standing on another straight line makes the adjacent angles equal to one another, each is .called a right angle, and the line standing on the other is said to be perpendicular to it. b.... | |
 | Euclides - 1862 - 172 Seiten
...only one angle at a point, it may be expressed by a letter placed at that point : as the angle at E.' X. When a straight line standing on another straight...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... | |
 | Euclides - 1862 - 140 Seiten
...two straight lines to one another, which meet together, but are not in the same straight line. 10. When a straight line standing on another straight...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... | |
 | Euclides - 1863 - 74 Seiten
...angle EDC? arc eg, of angle EDO, &c. A degree is the 300th part of the circumference of a circle. 10. When a straight line standing on another, straight line makes the adjacent angles equal to each other, each of these angles is called a right angle; D and the straight line which stands on the... | |
| |
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. 
