 | G. F. Burn - Geometry - 1903 - 272 pages
...angle, and obtuse when greater than a right angle. Angle CAB or angle A = 40°, is indicated thus : When a straight line standing on another straight line makes the adjacent angles equal ' pjg. 5. to one another, each of these angles is called a right angle; and the straight line which... | |
 | Euclid - Euclid's Elements - 1904 - 488 pages
...to be vertically opposite. The two angles CEB, AED are also vertically opposite to one another. 10. 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... | |
 | Calvin Franklin Swingle - Engineering - 1906 - 490 pages
...a plane which meet together, bnt are not in the same straight line as in Fig. 34. Fi(. 34. Fig 35. 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... | |
 | Charles Westinghouse - Machine design - 1906 - 168 pages
...to one another in a plane which meet together, but are not in the same straight line as in Fig. 34. 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... | |
 | Joseph H. Rose - Sheet-metal work - 1906 - 340 pages
...in a plane which meet together, but are not in the same straight line as in Fig. 1. Fig. 1. Fig. 2. 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... | |
 | William Hughes - 1908 - 942 pages
...other in a plane which meet together, but are not in the same straight line. A Right Angle is formed when a straight line standing on another straight line makes the adjacent angles equal to each other. Each of these angles is called a right angle, and the straight line which stands on the... | |
 | Euclid - Mathematics, Greek - 1908 - 550 pages
...containing the angle are straight, the angle is called rectilineal. 10. When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is right, and the straight line standing on the other is called a perpendicular to... | |
 | Henry John Spooner - Geometrical drawing - 1911 - 196 pages
...geometrical point is the point made by the intersection of two threads of a spider's web. Right Angle. — When a straight line standing on another straight line makes the adjacent angles (those on each side of it) equal to one another, each of them is called a right angle ; and the lines... | |
 | David Eugene Smith - Geometry - 1911 - 370 pages
...therefore confine our attention to having the concept understood. 10. When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is right, and the straight line standing on the other is called a perpendicular to... | |
 | Calvin Franklin Swingle - Steam engineering - 1913 - 1270 pages
...a plane which meet together, but are not in the same straight line as in Fig. 34. Fig. 34. Fig. 35. 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... | |
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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. 
