| Alexander Kennedy Isbister - 1865
...ECF; (i. 8) and they are adjacent angles. But, ' 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** ;' (def. 10) therefore each of the angles DCF, ECF, is a right angle. Wherefore, from the point C,... | |
| Euclid, Isaac Todhunter - 1867 - عدد الصفحات: 400
...angle ADG is equal to the angle BDG. [I. 8. But 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** ; [I. Definition 10. therefore the angle BDG is a right angle. But the angle BDF is also a right angle.... | |
| Euclid, Isaac Todhunter - 1867 - عدد الصفحات: 400
...angle ADG is equal to the angle BDG. [I. 8. But when a straight line, standing on another straight **line, makes the adjacent angles equal to one another, each of the** angle's is called "a right angle ; [I. Definition 10. therefore the angle BDG is a right angle. But... | |
| Robert Potts - 1868 - عدد الصفحات: 410
...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... | |
| Isaac Todhunter - 1869 - عدد الصفحات: 296
...angle, or four times another angle ; and so on. 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. Thus, in the figure, if the... | |
| Euclides - 1871
...the definition. IX. When a straight line (as AS) meeting another straight line (as CD) makes the A **adjacent angles equal to one another, each of the angles is called a RIGHT ANGLE; and** each line is said to be a PEEPENDICULAB to the other. c X. An OBTUSE ANGLE is one which is greater... | |
| Euclides, James Hamblin Smith - 1872 - عدد الصفحات: 349
...extension of the definition. IX. When a straight line (as AB) meeting another straight line (as CD) **makes the adjacent angles equal to one another, each of the angles is called a** EIGHT ANGLE; and each line is said to be a PER. _^_ PENDICULAR to the other. X. An OBTUSE ANGLE is... | |
| Henry Major - 1873
...named from three or one letters, as ABC or B. X. When a straight line standing oil 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. XI. An obtuse angle is greater... | |
| William Alexander Myers - 1873 - عدد الصفحات: 164
...; *that is, having a common center, as at F. 14. When a straight line standing on another straight **line makes the adjacent angles equal to one another, each of the angles is** a right angle, and the straight line which stands on the other is called a perpendicular to it; IKL... | |
| 1874
...by the letter at that point, as the angle E. 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 to it. 1 1 . An obtuse angle is that... | |
| |