| William Somerville Orr - 1854
...CD, are perpendicular to each other. An obtuse angle is æhat 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... | |
| Euclides - 1855
...vertical and horizontal line. XL An obtuse angle is that which is greater than a right angle. XIL x **An acute angle is that which is less than a right angle.** The term oblique angles is applied both to obtuse angles and to acute angles. XIIL [A term or boundary... | |
| Robert Rawson - 1856
...is called a perpendicular to it. XL 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.** /^ XHL " A term or boundary is the extremity of any thing." xrv. A figure is that which is inclosed... | |
| William Ezra Worthen - 1857 - 410 pągines
...obtuse angle is that which is greater than a right angle (fig. 4). Fig. 8. Fig. 4. Fig. 5. Fig. 6. **An acute angle is that which is less than a right angle** (fig. 5). A triangle is a flat surface bounded by three straight lines ; when the three sides are equal,... | |
| Euclides - 1860
...are said to be of the same rpecies when they are both less or both not less than a right angle. 16. **A .figure is that which is enclosed by one or more boundaries. The** space contained within the boundary of a plane figure is called its surface ; and its surface in reference... | |
| Robert Potts - 1860 - 361 pągines
...is called a perpendicular to it. XL An obtuse angle is that which is greater than a right angle. XIL **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 - 1862
...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... | |
| Euclides - 1863
...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... | |
| Henry S. Merrett - 1863 - 317 pągines
...perpendicular to another equal to 90 degrees, or the fourth part of a circle, as A В С, Fig. 12, Plate 1. **An acute angle is that which is less than a right angle,** as A В D. An obtuse angle is that which is greater than a right angle, or more than 90 degrees, as... | |
| Henry S. Merrett - 1863
...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... | |
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