 | David Steel - 1805 - 392 pagina’s
...is the angle of ABC. " I An (tht use Angle is that which is greater than a right A ' angle, as ABC. An Acute Angle is that which is less than a right angle, asDBC. By an ANGLE of ELEVATION is meant the angle contained between a line of direction, and any plane... | |
 | Charles James - 1805 - 1236 pagina’s
...side, and consequently the arches intercepted either way are equal to 90°, or the quarter of a circle. An Acute ANGLE, is that which is less than a right angle, or 90°. An Obtuse ANCLE, is that whicb is greater than a right angle. Adjacent ANGLES, are such as... | |
 | John Playfair - 1806 - 320 pagina’s
...perpendicular to it. _____ VIII, Book I. An obtuse angle is that which is greater than a right angle. IX. An acute angle is that which is less than a right angle. X. A figure is that which is inclosed by one or more boundaries. XL A circle is a plane figure contained... | |
 | Charles Vyse - 1806 - 342 pagina’s
...denotes the Angle I. An Obtuse Angle is that which is greater than a right Angle, as CAB, (Fig 3.; An acute Angle is that which is less than a right Angle, »s DCB, (Fig. 4.) A Superficies or Surface, is an Extension of two Dimensions, viz. Length and Breadth.... | |
 | George Adams - 1813 - 648 pagina’s
...letters, -that placed at the angular point being always in the middle ; as B is the angle of AB C. An acute angle is that which is less than a right angle. An obtuse angle is that which is greater than a right angle. A line AB, Jig. 2, plate 4, cutting another... | |
 | Euclides - 1814 - 560 pagina’s
...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. Xlll. " A term or boundary is th$ extremity of any thing." XIV. A figure is that which is inclosed... | |
 | John Gummere - 1814 - 398 pagina’s
...ADC and B'DE are called right angles, and the line CD is said to be perpendicular to AB, Fig. 4. 10. An acute angle is that which is less than a right angle, as BDE, Fig. 4. 11. An obtuse angle is that which is greater than a right angle, as ADE, Fig. 4. 13.... | |
 | William Jillard Hort - 1822 - 308 pagina’s
...A right angle, is that which is made by the meeting of two right lines perpendicular to each other. An acute angle, is that which is less than a right angle. An obtuse angle, is that which is greater than a right angle. A figure is that which is inclosed by... | |
 | Peter Nicholson - 1823 - 210 pagina’s
...oblique angles to AB ; and in the former case, fig. 6, CD is said to stand at right angles to AB. 10. An ACUTE ANGLE is that which is less than a right angle. 11. An OBTUSE ANGLE is that which is greater than a right angle. In fig. 7, as CD makes the angles... | |
 | Peter Nicholson - 1825 - 1046 pagina’s
...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 inclosed by... | |
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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. 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... 
