| Euclides - 1848
...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... | |
| Euclides - 1849
...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... | |
| Sir Henry Edward Landor Thuillier - 1851 - 718 pągines
...CBD, but if there be only one angle at a point it may be expressed by a letter placed at that point. **A figure is that which is enclosed by one or more boundaries. The** space contained within a figure is called the Area of the figure. A plane triangle is a figure bounded... | |
| 1851
...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... | |
| Janet Taylor - 1851 - 621 pągines
...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... | |
| James Elliot - 1851
...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... | |
| Euclides - 1852
...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 - 1853 - 147 pągines
...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... | |
| Euclides - 1853
...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... | |
| |