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. A course of geometrical drawing - Page 2by William Schofield Binns - 1861Full view - About this book
| G. F. Burn - Geometry - 1903 - 272 pages
...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...stands on the other is called a perpendicular to it.** Parallel lines are such that, if produced ever so far both ways, do not meet. The complement of an... | |
| Joseph Battell - Force and energy - 1903 - 722 pages
...straight line standing on another straight line makes the adjacent angles equal to one another, the angle **is called a right angle ; and the straight line which...stands on the other is called a perpendicular to it.'** "Ellen notices another error in a remark under this definition, viz. : 'When a straight line is perpendicular... | |
| Euclid - Euclid's Elements - 1904 - 488 pages
...said 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... | |
| 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...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... | |
| 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...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... | |
| 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...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.... | |
| William Hughes - 1908 - 942 pages
...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...stands on the other is called a perpendicular to it.** An Obtuse Angle is greater, and an Acute Angle is less, than a right angle. A Term or Boundary is the... | |
| 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...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.... | |
| D. Ponton - Mathematics - 1927 - 168 pages
...a common arm. Vertically opposite Angles are those made when two straight lines cross one another. **When a straight line, standing on another straight...stands on the other is called a perpendicular to it.** A right angle contains 90 degrees. An Obtuse Angle is one which is greater than a right angle. An Acute... | |
| R. H. Warn, John G. Horner - Technology & Engineering - 2002 - 292 pages
...straight liue, B, makes the adjacent angles equal to one another, each of B Fig. 1. Fig. 2. the angles Ls **called a right angle, and the straight line which...stands on the other is called a perpendicular to it** (Fig. 2). 8. An obtuse angle is that which is greater than a right angle (Fig. 3). 9- An acute angle... | |
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