 | Edward Clarke Lowe - 1866 - 172 sider
...called a right angle; and the straight line which stands on the other is & 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. ___^— 1 3. A term or boundary is the... | |
 | Euclid, Isaac Todhunter - 1867 - 426 sider
...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 sider
...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 sider
...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... | |
 | L J V. Gerard - 1874 - 428 sider
...ANGLES. DEFINITIONS. 11. A right angle is one of which the sides are perpendicular to one another. An obtuse angle is that which is greater than a right...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... | |
 | Euclides - 1874 - 120 sider
...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... | |
 | Euclides - 1874 - 342 sider
...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... | |
 | Edward Atkins - 1874 - 426 sider
...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 sider
...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... | |
 | Association for the improvement of geometrical teaching - 1876 - 66 sider
...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.... | |
| |
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... 
