 | Euclid, James Thomson - 1845 - 382 σελίδες
...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 which are in the same plane, and which, being produced ~~~ ever... | |
 | Great Britain. Admiralty - 1846 - 128 σελίδες
...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 of any thing. XIV. A figure is that which is enclosed by... | |
 | Great Britain. Admiralty - 1846 - 128 σελίδες
...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 of any thing. XIV. A figure is that which is enclosed by... | |
 | Euclides - 1846 - 292 σελίδες
...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 of any thing. xiv. A figure is that which is inclosed by one... | |
 | Euclides - 1847 - 128 σελίδες
...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 right angles; EBC is an obtuse, and EBD an acute angle ; and the line... | |
 | 458 σελίδες
...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 - 1848 - 52 σελίδες
...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. XIV. A figure is that which is inclosed by one or more boundaries. XV. A circle is a plane figure... | |
 | Charles Richson - 1848 - 98 σελίδες
...angles are described. DEFINITION. — " An obtuse angle is that which is greater than a right angle." " An acute angle is that which is less than a right angle." EXAMPLE IV.— To draw various angles in opposite sides of a horizontal or perpendicular. DIAGRAM,... | |
 | Euclid, Thomas Tate - 1849 - 120 σελίδες
...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. xin. " A term or boundary is the extremity of any thing." XIV. A figure is that which is inclosed by... | |
 | Janet Taylor - 1851 - 674 σελίδες
...angles CAD, CAB, equal to one another, each being a right angle containing 90° or 8 points. GEOMETRY. An acute angle is that which is less than a right angle, or 90°, as BAC. An obtuse angle is that which is greater than a right angle, as FDE. Rectilinear figures... | |
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... angles is called 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. "... 
