 | 1884 - 434 páginas
...of a right angle is as follows : " When a straight bine standing on another straight line makes the adjacent angles equal to one another, each of these angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it." Let us then take two sets... | |
 | Euclides - 1884 - 214 páginas
...angles which &o. QE Ti. Definition 10. When a straight line standing on another straight line makes the adjacent angles equal to one another, each of these angles is called a right angle. Proposition XL A straight -line may be drawn at right angles to a given straight line from a given... | |
 | 1885 - 150 páginas
...of a right angle is as follows : " When a straight line standing on another straight line makes the adjacent angles equal to one another, each of these angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it." Let us then take two sets... | |
 | William Chauvenet, William Elwood Byerly - 1887 - 331 páginas
...generated. 4. Definitions. When one straight line meets another, so as to make two adjacent angles equal, each of these angles is called a right angle; and the first line is said to be perpendicular to the second. Thus, if A OC and BOC are equal angles, each is a right angle, and the line CO is perpendicular... | |
 | William Chauvenet - 1888 - 826 páginas
...LINES. 8. Definition. When one straight line meets another, so as to make two adjacent angles equal, each of these angles is called a right angle ; and the first line is said to be perpe?idieular to the second. Thus, if AOC and BOC are equal angles, c each is a right angle, and the... | |
 | George William Usill - 1889 - 306 páginas
...always meant. 4. Perpendicular, — When a straight line standing on another straight line makes the adjacent angles equal to one another, each of these angles is called a right angle, and the straight lines are said to be perpendicular to each other. 5. Obtuse Angle.— An obtuse angle is greater... | |
 | Euclid - 1892 - 460 páginas
...and these are adjacent angles. But when a straight line, standing on another straight line, makes the adjacent angles equal to one another, each of these angles is called a right angle; Def. 1. therefore each of the angles DCF, ECF is a right angle. Therefore CF is at right angles to... | |
 | William Chauvenet - 1893 - 340 páginas
...generated. 4. Definitions. When one straight line meets another, so as to make two adjacent angles equal, each of these angles is called a right angle; and the first line is said to be perpendicular to the second. Thus, if A OC and BOC are equal angles, each is a right angle, and the line CO is perpendicular... | |
 | Seymour Eaton - 1899 - 362 páginas
...and these are adjacent angles. But when a straight line standing on another straight line makes the adjacent angles equal to one another, each of these angles is called a right angle (Definition 8) ; therefore each of the angles DCF and ECF is a right angle ; therefore CF is at right... | |
 | Charles Annandale, Ainsworth Rand Spofford - 1901 - 532 páginas
...straight line, as AB (fig. 1), standing on another straight line cu, makes the two angles ABC and ABD equal to one another, each of these angles is called a right awjlt. An acute anyle is that which is less than a right angle, as E n c. An ottuse angle is that which... | |
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When a straight line standing on another straight line, makes the adjacent angles equal to one another, each of these angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it. 
