 | Euclid - 1904 - 488 σελίδες
...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...stands on the other is called a perpendicular to it. 1 1 . An obtuse angle is an angle which is greater than a right angle. 12. An acute angle is an angle... | |
 | Charles Westinghouse - 1906 - 168 σελίδες
...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...stands on the other is called a perpendicular to it as in Fig. 35. An obtuse angle is that which is greater than a right angle as in Fig. 36. Fig. 36.... | |
 | Calvin Franklin Swingle - 1906 - 490 σελίδες
...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...stands on the other is called a perpendicular to it as in Fig 35. Fig. 38. An obtuse angle is that which is greater than a right angle as in Fig. 36. An... | |
 | Joseph H. Rose - 1906 - 340 σελίδες
...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...stands on the other is called a perpendicular to it as in Fig. 2. GEOMETEIIAI A tine s Ls-^ri "w^i Th? ai/K "..« if i : A straigfe: extreme p:ira». A... | |
 | Henry Sinclair Hall - 1908 - 286 σελίδες
...also vertically opposite to one another. 7, When one straight line stands on another so as to make the adjacent angles equal to one another, each of the angles is called a right angle • and each line is said to be perpendicular to the other. AXIOMS, (i) If O is a point in a straight line... | |
 | William Hughes - 1908 - 942 σελίδες
...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 - 1908 - 550 σελίδες
...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 that... | |
 | Henry John Spooner - 1911 - 196 σελίδες
...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 - 1911 - 370 σελίδες
...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 that... | |
 | Calvin Franklin Swingle - 1913 - 1270 σελίδες
...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...stands on the other is called a perpendicular to it as in Fig 35. Fig. 36. An obtuse angle is that which is greater than a right angle- as in Fig. 36.... | |
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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. 
