 | William Pease - 1843 - 80 sider
...are apt to suppose that a perpendicular, must be a vertical, or plumb line, which it need not be. 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. The length of the legs of a rectilineal... | |
 | Euclid, James Thomson - 1845 - 382 sider
...which stands on the other is called a perpendicular to it, and is said to be at right angles to it. 9. An obtuse angle is that which is greater than a right angle. 10. An acute angle is that which is less than a right angle. 11. Parallel straight lines are those... | |
 | Euclid - 1845 - 218 sider
...right angle ; and the straight tine 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. XIII. " A term or boundary is the extremity of any thing." XIV. A figure is that which is inclosed... | |
 | Scottish school-book assoc - 1845 - 444 sider
...a right angle; and the strnight line which stands on the other is called a perpendicular to it. 10. An obtuse angle is that which is greater than a right angle. 1 1 . An acute angle is that which is less than a right angle. 12. A term or boundary is the extremity... | |
 | Euclides - 1845 - 546 sider
...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... | |
 | Great Britain. Admiralty - 1846 - 128 sider
...«r C 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... | |
 | Euclides - 1846 - 292 sider
...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. xn. An acute angle is that which is less than a right angle. xin. A term or boundary is the extremity... | |
 | Great Britain. Admiralty - 1846 - 128 sider
...E. X. 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... | |
 | 458 sider
...THE DECORATORS ASSISTANT. Steps to DEFINITIONS OF PRACTICAL GEOMETRY. (Continued from page 5.) 18. AN acute angle is that which is less than a right angle, as n rr 19. An obttue angle it that which is greater than a right angle, as n E F. OBs.— An ingle... | |
 | Euclides - 1847 - 128 sider
...a 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. Thus the angles ABC, ABD are each of them... | |
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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... 
