 A Right Angle is an angle included between two straight lines which meet each other so that the two adjacent angles formed by producing one of the lines through the vertex are equal. Thus if the straight line AB meet the straight line С D...  A Manual of Mechanical Drawing - Page 2by Philip Devereux Johnston - 1903 - 149 pagesFull view - About this book
 | Edward Olney - Geometry - 1872 - 562 pages
...are distinguished as Right Angles and Oblique Angles. Oblique angles are either Acute or Obtuse. 26. A Right Angle is an angle included between two straight lines which meet each other in such a manner as to make the adjacent angles equal. An Acute Angle is an angle which is less than... | |
 | Edward Olney - Geometry - 1872 - 472 pages
...distinguished as Right Angles &ъа Oblique Angles. Oblique angles are either Acute or Obtuse. 26. A Bight Angle is an angle included between two straight lines which meet each other in such a manner as to make the adjacent angles equal. An Acute Angle is an angle which is less than... | |
 | George Albert Wentworth - Geometry - 1877 - 416 pages
...vertex and a common side between them. Thus the angles С DE and CDF are adjacent angles. 25. DEF. A Right Angle' is an angle included between two straight...through the vertex are equal. Thus if the straight line AB meet the straight line С D so that the adjacent angles Л .5(7 and AB D are equal to one another,... | |
 | George Albert Wentworth - Geometry - 1877 - 416 pages
...A Right Angle is an angle included I'dwocn two straight lines which meet each other so that the two angles formed by producing one of the lines through the vertex are equal. Thus if the straight line AB meet the straight line CD so that the adjacent angles ABC and ADD are equal to one another, each... | |
 | Edward Olney - 1879 - 278 pages
...are distinguished as Right Angles and. Oblique Angles. Oblique angles are either Acute or Obtuse. 26. A Right Angle is an angle included between two straight lines which meet each other in such a manner as to make the adjacent angles equal. An Acute Angle is an angle which is less than... | |
 | George Albert Wentworth - 1881 - 266 pages
...vertex and a common side between them. Thus the angles С DE and С DF are adjacent angles. E 25. DEF. A Right Angle is an angle included between two straight...through the vertex are equal. Thus if the straight line AB meet the straight line С D so that the adjacent angles ABC and AB D are equal to one another, each... | |
 | George Albert Wentworth - Geometry, Modern - 1882 - 268 pages
...a common side between them. Thus the angles С DE and С DF are adjacent angles. E 25. DEF. A Eight Angle is an angle included between two straight lines...through the vertex are equal. Thus if the straight line AB meet the straight line С D so that the adjacent angles ABC and AB D are equal to one another, each... | |
 | Franklin Ibach - Geometry - 1882 - 208 pages
...common vertex and / one common side between them. Thus, the angles a and 6 are adjacent angles. 19. A Right Angle is an angle included between two straight lines which meet each other so as to make the adjacent angles equal. Thus, if the angles a and b are equal, each is a right angle.... | |
 | Franklin Ibach - Geometry - 1882 - 208 pages
...vertex and one common side between them. Thus, the angles a and b are adjacent angles. 19. A Sight Angle is an angle included between two straight lines which meet each other so as to make the adjacent angles equal. Thus, if the angles a and b are equal, each is a right angle.... | |
 | Edward Olney - Geometry - 1883 - 352 pages
...distinguished as Right Angles and Oblique Angles. Oblique angles are either Acute or Obtuse. Fig. 12. 36. A Right Angle is an angle included between two straight lines which meet each other in such a manner as to make the adjacent angles equal. 37. An Acute Angle is an angle which is less... | |
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