 | Euclides - 1864 - 262 páginas
...the angle ABI), or DBA ; and that which is contained by DB, CB, is called the angle DEC, or CBD. X. When a straight line standing on another straight...stands on the other is called a perpendicular to it. XI. An obtuse angle is that which is greater than a right angle. xn. An acute angle is that which is... | |
 | Euclides - 1864 - 448 páginas
...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... | |
 | Robert Potts - 1865 - 528 páginas
...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... | |
 | Euclides - 1865 - 402 páginas
...angle at a point, it may be expressed by a letter placed at that point : as the angle at !•'.. 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 - 1865 - 80 páginas
...lines which meet in a point, called the vertex of an angle, and the two lines are called its sides. 9. When a straight line standing on another straight line makes the adjacent angles equal, each of them is called a RIGHT ANGLE; and the straight line which stands upon the other is called a... | |
 | William Harris Johnston - 1865 - 478 páginas
...other angle between them, such as the angles ВАС and DA 0. When one straight line standing upon another straight line makes the adjacent angles equal to one another, each such angle is called a right angle, and either of the straight lines is said to be a perpendicular... | |
 | Edward Clarke Lowe - 1866 - 172 páginas
...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...and the straight line which stands on the other is & perpendicular to it. 11. An obtuse angle is that which is greater than a right angle. 12. An acute... | |
 | Walter Marsham Adams - 1866 - 114 páginas
...one straight line standing upon another straight line makes the adjacent angles equal to each other, each of these angles is called a right angle, and the straight lines are said to be perpendicular to each other." And as the angle in a straight line was shown to... | |
 | Euclid, Isaac Todhunter - 1867 - 426 páginas
...from the centre G ; [I. Definition 15. therefore the angle ADG is equal to the angle BDG. [I. 8. But when a straight line, standing on another straight...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.... | |
 | George Frederick Chambers - 1867 - 888 páginas
...lines to each other in the same plane gives rise to a plant rectilineal angle, or simply an angle. When a straight line, standing on another straight line, makes the adjacent angles equal to each other, each of those angles is called a right angle; but if the adjacent angles are not equal... | |
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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. 
