 | Euclid, Thomas Tate - 1849 - 120 pages
...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... | |
 | James Elliot - 1851 - 152 pages
...22. The angle on either side of the perpendicular is called a Right Angle, as NOL, or NOM, or F. 23. An Acute Angle is that which is less than a right angle, as G. 24. An Obtuse Angle is greater than a right angle, as H. 25. An Oblique Angle is any one that... | |
 | Janet Taylor - Nautical astronomy - 1851 - 674 pages
...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... | |
 | Encyclopedias and dictionaries - 1851 - 696 pages
...determining the angle. A right angle is half the opening of a straight line and its continuation ; an acute angle is that which is less than a right angle ; an obtuse angle is that which lies between one and two right angles. Complemental angles are two... | |
 | Euclides - 1852 - 152 pages
...in other words, equal 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 of any thing." XIV. A figure is that which is inclosed... | |
 | Euclides - Geometry - 1853 - 176 pages
...called a perpendicular toit. 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. Obtuse. XIII. A term or boundary is the extremity of any thing. XIV. A figure is that which is enclosed... | |
 | Encyclopedias and dictionaries - 1853 - 1034 pages
...determining the angle. A rigkt angle is half the opening of a straight line and its continuation ; an acute angle is that which is less than a right angle ; an oLitise angle is that which lies between one and two right ! angles. Contplemcntal angles are... | |
 | Royal Military Academy, Woolwich - Mathematics - 1853 - 400 pages
...called a perpendicular to it. 11. An obtuse angle is that \vhich is greater than a right angle. 12. An acute angle is that which is less than a right angle. 13. A term or boundary is the extremity of anything. 14. A figure is that which is enclosed by one... | |
 | Euclides - 1853 - 146 pages
...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." xrv. A figure is that which is inclosed by... | |
 | William Somerville Orr - Science - 1854 - 534 pages
...CD, are perpendicular to each other. An obtuse angle is ¿hat which is greater than a right angle. An acute angle is that which is less than a right angle. XI. A figure is that which is enclosed by one or more boundaries. XII. A circle is a plane figure enclosed... | |
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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... 
