 | William Chauvenet, William Elwood Byerly - Geometry - 1887 - 331 pages
...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... | |
 | John Thornton - Physical geography - 1888 - 266 pages
...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.' We find it convenient for the purposes of angular measurement to divide... | |
 | George William Usill - Surveying - 1889 - 306 pages
...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 than... | |
 | Edward Albert Bowser - Geometry - 1890 - 414 pages
...said to bisect the angle between the non-coincident sides BA and BE. Fig. 6 Fig. 7 0 Fig. 8 O Fig. 9 called a right angle; and the straight line which...said to be perpendicular or at right angles to it. Thus, if the adjacent angles AOC and BOC are equal to each other, each is a right angle, and the line... | |
 | Edward Mann Langley, W. Seys Phillips - 1890 - 538 pages
...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. 11. An Obtuse Angle is that which is greater than a right angle. 12.... | |
 | Euclid - Geometry - 1890 - 442 pages
...fail. Def. When one straight line stands upon another straight line, and makes the adjacent angles equal, each of these angles is called a right angle ; and the lines are said to be at right angles to each other. Def. When two straight lines are at right angles... | |
 | Edward Albert Bowser - Geometry - 1891 - 424 pages
...them, and the common side BC is said to bisect the angle between the non-coincident sides BA and BR. called a right angle; and the straight line which stands on the other is said to be perpendicu- , • . lar or at right angles to it. Thus, if the adjacent angles AOC and BOC are equal... | |
 | Euclid - Geometry - 1892 - 460 pages
...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. Therefore CH is a perpendicular drawn to the given straight line AB from... | |
 | Henry Martyn Taylor - 1893 - 486 pages
...them). DEFINITION 11. If two adjacent angles made by two straight lines at the point where they meet be equal, each of these angles is called a right angle, and the straight lines are said to be at right angles to each other. Either of two straight lines which C are at right... | |
 | William Chauvenet - 1893 - 340 pages
...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... | |
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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. 
