 | John Playfair - 1806 - 320 sider
...placed at that point ; as the angle at E.' VII. When a straight line standing on another straight line makes the adjacent angles equal to .one another, each...stands on the other is called a perpendicular to it. _____ VIII, Book I. An obtuse angle is that which is greater than a right angle. IX. An acute angle... | |
 | Robert Simson - 1806 - 546 sider
...placed at that point; as < the angle at E.' X. When a straight line standing on another straight lii>e makes the adjacent angles equal to one another, each...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... | |
 | John Mason Good - 1813 - 714 sider
...together, but are not in the same straight line. 10. When a straight line standing on another straight line makes the adjacent angles equal to one another, each...stands on the other is called a perpendicular to it. 11. An obtuse an¿le is that which is greater 'than a right angle. IS. An acnte angle is that which... | |
 | John Playfair - 1819 - 354 sider
...placed at that point ; as the angle at E.' VII. When a straight line standing on another straight line makes the adjacent angles equal to one another, each...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... | |
 | John Mason Good - 1819 - 800 sider
...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... | |
 | Euclid, Robert Simson - 1821 - 514 sider
...placed at that point; ' as the angle at E.' X. When a straight line standing on another straight line makes the adjacent angles equal to one another, each...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... | |
 | Peter Nicholson - 1825 - 1046 sider
...placed at that point ; as the angle at E.' 10. When a straight line standing on another straight line makes the adjacent angles equal to one another, each...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... | |
 | George Lees - 1826 - 276 sider
...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,... | |
 | Robert Simson - 1827 - 546 sider
...placed at that point : as the angle at E.' X. When a straight line standing on another straight line makes the adjacent angles equal to one another, each...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 sider
...angle contained by the line С В and DB. 7. When a straight line standing on another straight line makes the adjacent angles equal to one another, each...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... | |
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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. 
