 | Adrien Marie Legendre - 1819 - 574 Seiten
...AB (Jig. 3) meets another straight line CD in such a manner that the adjacent angles BAC, BAD, are equal, each of these angles is called a right angle, and the line .III is said to be perpendicular to CD. Fig- 4. ii. Every Shgle BJiC (Jig. 4), less than a right... | |
 | 1854 - 1112 Seiten
...the sum or difference of two given ones, &c. Def. 10. When one right line standiag on another makes the adjacent angles equal, each of these angles is called a right angle, and each -of the lines is said to be perpendicular to the other. When, as in the previous illustration,... | |
 | Adrien Marie Legendre, John Farrar - 1825 - 294 Seiten
...AB (fig- 3) meets another straight line CD in such a manner that the adjacent angles BAC, BAD, are equal, each of these angles is called a right angle, and the line AB is said to be perpendicular to CD. Fig. 4. 11. Every angle BAC (fig. 4), less than a right... | |
 | Adrien Marie Legendre, John Farrar - 1825 - 280 Seiten
...AB (fig. 3) meets another straight line CD in such a manner that the adjacent angles BAC, BADr are equal, each of these angles is called a right angle, and the line AB is said to be perpendicular to CD. Fig. 4. 11. Every angle BAG (fig. 4), less than a right... | |
 | Euclid, Dionysius Lardner - 1828 - 542 Seiten
...but are not in the same right line. (11) X. When a right line standing on another right line makes the adjacent angles equal, each of these angles is called a right angle, and each of these lines is said to be perpendicular to the other. (12) XI. An obtuse angle is an angle... | |
 | James Thomson (LL.D.) - 1837 - 296 Seiten
...opening or divergence. II. When one straight line standing on another, makes with it two angles which are equal, each of these angles is called a RIGHT ANGLE ; and the straight line which stands on the other is said to be PERPENDICULAR, Or AT RIGHT ANGLES, tO it, or... | |
 | Adrien Marie Legendre - 1841 - 288 Seiten
...AB (fig. 3) meets another straight line CD in sucli a manner that the adjacent angles BAC, BAD, are equal, each of these angles is called a right angle, and the line AB is said to be perpendicular to CD. Fig. 4. 11. Every angle BA C (fig. 4), less than a right... | |
 | George Roberts Perkins - 1856 - 460 Seiten
...Vertex of the angle is the point where its sides meet. XII. When one straight, line meets or crosses another, so as to make the adjacent angles equal, each of these angles is called a Sight angle, and the lines are said to be perpendicular to each other. XIII. An Acute angle is one... | |
 | James Maurice Wilson - 1868 - 132 Seiten
...different sides of the common arm. Def. 10. When one straight line stands upon another straight line so as to make the adjacent angles equal, each of these angles is called a right angle, and the line is said to be perpendicular to the other, or at right angles to the other. If the adjacent angles... | |
 | William Chauvenet - 1871 - 380 Seiten
...PERPENDICULARS AND OBLIQUE 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 perpendicular to the second. Thus, if A OC and BOC are equal angles, c each... | |
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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. 
