 | Walter Smith - Blackboard drawing - 1872 - 166 pages
...— No. 1. A right angle. No. 2. An obtuse angle is that which is greater than a right angle. No. 3. An acute angle is that which is less than a right angle. The dotted line shows a right angle in 2 and 3. DIVISION ft. TRIANGLES NAMED FROM TIIEIK ANGLES. DEFINITIONS.... | |
 | Euclid, James Bryce, David Munn (F.R.S.E.) - Geometry - 1874 - 236 pages
...angle. 10. An obtuse angle is that which is greater than a right angle, but less than two right angles. 11. An acute angle is that which is less than a right angle. 12. A figure is a portion of space enclosed by one or more boundaries. 13. A plane figure is that which... | |
 | L J V. Gerard - 1874 - 428 pages
...sides are perpendicular to one another. An obtuse angle is that which is greater than a right angle ; an acute angle is that which is less than a right angle. 12. When two angles are together equal to a right angle they are complementary angles, and each of them... | |
 | Euclides - 1874 - 342 pages
...called a perpendicular to it. 11. An obtuse angle is that which is greater than a right angle. / 18. An acute angle is that which is less than a right angle. 13. A term or boundary is the extremity of any thing. 14. A figure is that which is inclosed by one... | |
 | Edward Atkins - 1874 - 426 pages
...right angle; and the straight line which stands on the other is called a perpendicular to it. 1 1 . An obtuse angle is that which is greater than a right angle. 12. An acute angle is that which is less than a right angle. 13. A term or boundary is the extremity... | |
 | Euclides - 1874 - 120 pages
...called a perpendicular to it. 11. An obtuse angle is that which is greater than a right angle. 12. An acute angle is that which is less than a right angle. 13. A term or boundary is the extremity of any thing. 14. A figure is that which is enclosed by one... | |
 | Edward Atkins - 1876 - 130 pages
...right angle; and the straight line which stands on tho other is called a perpendicular to it. 1 1 . An obtuse angle is that which is greater than a right angle. 12. An acute angle is that which ia less than a right angle. 13. A term or boundary is tho extremity... | |
 | Association for the improvement of geometrical teaching - Geometry, Modern - 1876 - 66 pages
...A perpendicular 'to a straight line is a straight line that makes a right angle with it. DEF. 1 6. An acute angle is that which is less than a right angle. DEF. 17. An obtuse angle is that which is greater than one right angle, but less than two right angles.... | |
 | Robert Potts - Geometry - 1876 - 446 pages
...called a perpendicular to it. XL •An obtuse angle is that which is greater than a right angle. xn. An acute angle is that which is less than a right angle. XIII. A term or Boundary is the extremity ot any tM%. XIV. A figure is that which is enclosed TiV one... | |
 | Edward Atkins - 1877 - 72 pages
...called a perpendicular to it. 1 1 . An obtuse angle is that which is greater than a right angle. 12. An acute angle is that which is less than a right angle. 13. A term or boundary is the extremity of anything. 14. A figure is that which is enclosed by one... | |
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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. 11. An obtuse angle... 
