 | 1898 - عدد الصفحات: 610
...6m, is named the angle с m Ъ. — When a straight line, cm, standing on another straight line, a b. makes the adjacent angles equal to one another, each of the angles erne, cmb, is culled a right anglr; and the straight lines are said to be perpendicular to each other.... | |
 | Euclid, Henry Sinclair Hall, Frederick Haller Stevens - 1900 - عدد الصفحات: 330
...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 to it. 1 1 . An obtuse angle is an... | |
 | Euclid - 1904 - عدد الصفحات: 488
...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 to it. 1 1 . An obtuse angle is an... | |
 | Joseph H. Rose - 1906 - عدد الصفحات: 340
...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 to it as in Fig. 2. GEOMETEIIAI A... | |
 | Calvin Franklin Swingle - 1906 - عدد الصفحات: 490
...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 to it as in Fig 35. Fig. 38. An obtuse... | |
 | Charles Westinghouse - 1906 - عدد الصفحات: 168
...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 to it as in Fig. 35. An obtuse angle... | |
 | Henry Sinclair Hall - 1908 - عدد الصفحات: 286
...also vertically opposite to one another. 7, When one straight line stands on another so as to make the adjacent angles equal to one another, each of the angles is called a right angle • and each line is said to be perpendicular to the other. AXIOMS, (i) If O is a point in a straight line... | |
 | Euclid - 1908 - عدد الصفحات: 550
...the angle ECF; [i. 8] and they are adjacent angles. But, when a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal ingles is right ; [Def. 10] therefore each of the angles DCF> FCE is right. Therefore the straight... | |
 | David Eugene Smith - 1911 - عدد الصفحات: 360
...confine our attention to having the concept understood. 10. When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is right, and the straight line standing on the other is called a perpendicular to that... | |
 | Calvin Franklin Swingle - 1913 - عدد الصفحات: 1270
...same straight line as in Fig. 34. Fig. 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 to it as in Fig 35. Fig. 36. An obtuse... | |
| |
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. 
