 | Euclides - 1826 - 226 pagina’s
...equal angles is a right angle, and the right Tine standing on the other is called a perpendicular. 11. An obtuse angle is that which is greater than a right angle. 13. A term is the extremity of any thing. 14. A figure is that which is contained under one or more... | |
 | Robert Simson - 1827 - 546 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. XIII. " A term or boundary is the extremity... | |
 | Ferdinand Rudolph Hassler - 1828 - 180 pagina’s
...angle, is that which is greater than a right angle. In figure 1, the angle ErfB, is an obtuse angle. 9. An acute angle, is that which is less than a right angle. In figure 1, the angle E.tfD, is an acute angle. 10 Figure, is any space terminated. (So figure 2 to... | |
 | John Bonnycastle - 1829 - 256 pagina’s
...are perpendicular to each other.* 11. An acute angle is that which is less than a right angle. 12. An obtuse angle is that which is greater than a right angle. PRACTICAL GEOMETRY. 15 13. A circle is a plane figure, formed by the revolution of a right line about... | |
 | John Playfair - 1829 - 210 pagina’s
...necessarily equal to one another, ED. 12. An obtuse angle is that which is greater than a right angle13. An acute angle is that which is less than a right angle. Note. An angle which is either acute or obtuse is often called an oblique angle. ED. 14. If two lines... | |
 | Thomas Curtis - 1829 - 814 pagina’s
...RIGHT ANGLE, and the straight line which stands on the other is called a PERPENDICULAR. Fig. 4. 8. An OBTUSE ANGLE is that which is greater than a right angle. Fig. 5. 9. An ACUTE ANGLE is that which is less than a right angle. 'Fig. 6. 10. PARALLEL STRAIGHT... | |
 | John Bonnycastle - 1833 - 310 pagina’s
...A right angle is that which is formed by two line* that are perpendicular to each other.* .-. > il. An acute angle is that which is less than a right angle. 12. An obtuse angle is that which is greater than a righi angle. * Any angle differing from a right one,... | |
 | John Playfair - 1832 - 358 pagina’s
...right angle; and the straight line which stands on the other is called a perpendicular to it i VIII. An obtuse angle is that which is greater than a right angle. IX. An acute angle is that which is less than a right angle. .A.. A figure is that which is enclosed... | |
 | Euclid - 1835 - 540 pagina’s
...a right angle ; and the straight line which stands on the other is called a perpendicular to it XI. 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. XIII. " A term or boundary is the extremity... | |
 | 1836 - 488 pagina’s
...a right angle ; and the straight line which stands on the other is called a perpendicular to it. 8. An obtuse angle is that which is greater than a right angle. 9. An acute angle is that which is less than a right angle. 10. A figure is that which is enclosed... | |
| |
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... 
