 | Robert Potts - 1868 - 434 páginas
...is called the angle DBG, or CBD. I 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. XL An obtuse angle is that... | |
 | E. M. Reynolds - 1868 - 172 páginas
...letter only is often used, as A. When one 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 said to be perpendicular to it. We acquire a clear idea... | |
 | John Lowres - 1870 - 130 páginas
...another straight line so that the adjacent angles (or those on each side of it) are equal to each other, each of these angles is called a right angle ; and the first line is said to be PERPENDICULAR to the second : as HK and ' • L M. When an angle is greater than a right angle it is said to be obtuse,... | |
 | William Chauvenet - 1871 - 380 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 perpendicular to the second. Thus, if A OC and BOC are equal angles, c each is a right angle, and the line CO is perpendicular... | |
 | William Chauvenet - 1872 - 382 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 perpendicular to the second. Thus, if AOC and BOC are equal angles, c each is a right angle, and the line CO is perpendicular... | |
 | John Clement P. Aldous - 1874 - 104 páginas
...which angles may be measured. DBF. When one straight line standing on another straight line makes the adjacent angles equal to one another, each of these angles is called a Bight Angle. Now all right angles are equal to one another. So that any angle may be measured by them.... | |
 | Henry Lewis (M.A.) - 1875 - 104 páginas
...little too difficult for beginners: — 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. An acute angle is less than a right angle, as ABD, DEE. An obtuse angle is greater than a right angle,... | |
 | Richard Wormell - 1876 - 268 páginas
...opposite sides of a common side. 1 8. When one 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 said to be perpendicular to it. 19. When one straight line... | |
 | Robert Potts - 1876 - 446 páginas
...called the angle DBC, or CUD. X. 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. XL •An obtuse angle is that... | |
 | William Guy Peck - 1876 - 412 páginas
...to form two angles, these angles are said to be adjacent. If the adjacent angles are equal, each A is called a right angle, and the first line is said to be perpendicular to the second. Thus, if DOA and DOP are equal, each is a right angle, and OD is perpendicular to PA, at... | |
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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. 
