 | 1866 - 520 pagina’s
...enters, its tangent is the straight lino which is used in determining the angle. ANGLE (RECTILINEAR). 311 an acute angle is that which is less than a right angle ; an dbhae angle is that which lies between ona and two right angles. Complemcntal angles are two which... | |
 | Euclid, Isaac Todhunter - 1867 - 426 pagina’s
...right angle ; and the straight line which stands on the other is 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... | |
 | Robert Potts - 1868 - 434 pagina’s
...a right angle ; and the straight line which stands on the other is called a perpendicular to it. XL An obtuse angle is that which is greater than a right angle. XII. An acute angle is that which is less than a right angle. XTTI. A term or boundary is the extremity... | |
 | Walter Smith - 1872 - 166 pagina’s
...Three Lines: Angles and Triangles. DIVISION a. ANGLES. DEFINITIONS. — 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 risjht OO angle. The dotted line shows a right angle... | |
 | Euclides - 1874 - 342 pagina’s
...right angle ; and the straight line which stands on the other is 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... | |
 | Euclides - 1874 - 120 pagina’s
...right angle ; and the straight line which stands on the other is 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... | |
 | Edward Atkins - 1874 - 426 pagina’s
...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... | |
 | Euclid, James Bryce, David Munn (F.R.S.E.) - 1874 - 236 pagina’s
...and AOE, each of which is greater than two right angles. Such an angle is called a reflex 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... | |
 | Robert Potts - 1876 - 446 pagina’s
...a right angle ; and the straight line which stands on the other is 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... | |
 | Association for the improvement of geometrical teaching - 1876 - 66 pagina’s
...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.... | |
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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... 
