 | John Mason Good - 1819 - 800 σελίδες
...adjacent angles equal to one another, each of (lie angles is called и right angle; and the ira glu line which stands on the other is called a perpendicular to it. 11. An obtuse angle is that which is g cater than a right an^le. 12. Ли acute angle is that which ¡s less than a ri^ht angle. 13. " A... | |
 | John Playfair - 1819 - 350 σελίδες
...right angle ; and the straight line which stands on the other is called a perpendicular to it. VIII. An obtuse angle is that which is greater than a right angle. An acute angle is that which is less than a right angle. X. A figure is that which is inclosed by one... | |
 | Euclid, Robert Simson - 1821 - 514 σελίδες
...the angle at E.' X. When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called...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... | |
 | William Jillard Hort - 1822 - 308 σελίδες
...right lines perpendicular to each other. An acute angle, is that which is less than a right angle. An obtuse angle, is that which is greater than a right angle. A figure is that which is inclosed by one or more boundaries. A circle is a plane figure, bounded by... | |
 | Peter Nicholson - 1823 - 210 σελίδες
...is said to stand at right angles to AB. 10. An ACUTE ANGLE is that which is less than a right angle. 11. An OBTUSE ANGLE is that which is greater than a right angle. In fig. 7, as CD makes the angles on each side of it unequal, one of them must be greater than the... | |
 | George Lees - 1826 - 276 σελίδες
...When a straight line AB, standing on another straight line CD, makes the adjacent angles ABC and ABD equal to one another, each of the angles is called...stands on the other, is called a perpendicular to it. •D OF GEOMETRY. with another CD, upon one side of it, are eitlier two right angles, or are, together,... | |
 | Euclides - 1826 - 226 σελίδες
...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 σελίδες
...the angle at E.' X. When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called...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... | |
 | Thomas Curtis - 1829 - 814 σελίδες
...line С В and DB. 7. When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called...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... | |
 | John Playfair - 1829 - 210 σελίδες
...When a straight line standing on another straight line makes the adjacent angles equal to each other, each of the angles is called a right angle; and the...stands on the other is called a perpendicular to it. Otherwise. When a straight line standing on another straight line does not incline to either side of... | |
| |
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. 
