| Euclid, Isaac Todhunter - Euclid's Elements - 1883 - 428 pages
...angle AFE is equal to the angle BFE. [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 each of the angles AFE, BFE is a right... | |
| Euclides - 1883 - 176 pages
...; name also two vertically opposite angles. H 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 each of the lines is perpendicular to the other, or at right angles... | |
| Stewart W. and co - 1884 - 272 pages
...named from three or one letters, as ABC or B. 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... | |
| John Thornton - Physical geography - 1888 - 266 pages
...the following definition of a right angle : — ' 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... | |
| Edward Mann Langley, W. Seys Phillips - 1890 - 538 pages
...instead of it. See Note 2 on Prop. 9. DEF. 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 said to be perpendicular,... | |
| Euclid, Henry Sinclair Hall, Frederick Haller Stevens - Euclid's Elements - 1900 - 330 pages
...are also vertically opposite to one another. 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... | |
| Euclid - Euclid's Elements - 1904 - 488 pages
...are also vertically opposite to one another. 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... | |
| Joseph H. Rose - Sheet-metal work - 1906 - 340 pages
...same straight line as in Fig. 1. Fig. 1. Fig. 2. 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... | |
| Calvin Franklin Swingle - Engineering - 1906 - 490 pages
...same straight line as in Fig. 34. Fi(. 34. Fig 35. 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... | |
| Charles Westinghouse - Machine design - 1906 - 168 pages
...are not in the same straight line as in Fig. 34. 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... | |
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