 | Henry S. Merrett - 1863 - 476 pages
...perpendicular to another equal to 90 degrees, or the fourth part of a circle, as ABC, Fig. 12, Plate 1. An acute angle is that which is less than a right angle, as ABD. An obtuse angle is that which is greater than a right angle, or more than 90 degrees, as DB... | |
 | Euclides - 1863 - 122 pages
...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. ^\ Both obtuse angles and acute angles are termed oblique. -^XIII. A term or boundary is the extremity... | |
 | Euclides - 1864 - 448 pages
...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. A term or boundary is the extremity of any thing. XIv. A figure is that which is enclosed by... | |
 | Euclides - 1865 - 80 pages
...other is called a PERPENDICULAR to it. 10. An OBTUSE ANGLE is that which is greater than a right angle. 11. An ACUTE ANGLE is that which is less than a right angle. 12. PARALLEL LINES, or those straight lines which are in the same plane, and being produced ever so far... | |
 | Euclides - 1865 - 402 pages
...called a right angle ; and the straight line which stands on the other is called a perpendicular to it. An obtuse angle is that which is greater than a right angle. XVIII. A semicircle is the figure contained by a diameter and the part of the circumference cut off... | |
 | Robert Potts - 1865 - 528 pages
...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. XIII. A term or boundary is the extremity of any thing. XIV. A figure is that which is enclosed by... | |
 | Encyclopedias and dictionaries - 1866 - 520 pages
...enters, its tangent is the straight lino which is used in determining the angle. ANGLE (RECTILINEAR). 311 an acute angle is that which is less than a right angle ; an dbhae angle is that which lies between ona and two right angles. Complemcntal angles are two which... | |
 | Edward Clarke Lowe - 1866 - 172 pages
...other is & 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. ___^— 1 3. A term or boundary is the extremity ot anything. 14. Afgure is that which is enclosed... | |
 | Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 426 pages
...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. 13. A term or boundary is the extremity of any thing. 14. A figure is that which is enclosed by one... | |
 | Robert Potts - 1868 - 434 pages
...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. XTTI. A term or boundary is the extremity of any thing. xrv. XV. A circle is a plane figure contained... | |
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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... 
