| John Ward - 1747 - 480 pagina’s
...is, AC, and C J5, are Perpendicular to £> C, as well as -D, C is to /•j'r/W or both of them. g. **An OBTUSE ANGLE is that which is greater than a Right Angle.** Such is the Angle included between the Lines AC and n CB. 10. An ACUTE ANGLE is that ^_ which is lefs... | |
| Euclid - 1781 - 520 pagina’s
...angle ; and the ftraight line which ftands on the other is called a perpendicular to it. XI. An obtufe **angle is that which is greater than a right angle. ,. An acute angle is that which is** lefs than a right angle. > '.'XIII. , •i. ;. " A term or boundary is the extremity of any thing."... | |
| Proclus (Diadochus.) - 1788
...and the infifting Right Line, is called a PERPENDICULAR to that upon which it ftands. DEFINITION Xf. **An OBTUSE ANGLE is that which is greater than a RIGHT ANGLE.** DEFINITION XII. But an ACUTE ANGLE, is that which is Icfs than a RIGHT ANGLE, THESE are the triple... | |
| David Steel - 1805
...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 - 1006 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... | |
| Charles Vyse - 1806 - 320 pagina’s
...placed at the Angular Point being always wrote in the Middle, as ADC (Fig. 4. 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... | |
| Robert Simson - 1806 - 518 pagina’s
...right angle ; and the straight line which stands on the other is 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 anp-Ic. • XIII. rt A term or boundary is the... | |
| John Playfair - 1806 - 311 pagina’s
...and the straight line which stands on the other is called a 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... | |
| George Adams - 1813 - 534 pagina’s
...three letters, that placed at the angular point being always in the middle ; as B is the angle of ABC. **An obtuse angle is that which is greater than a right...acute angle is that which is less than a right angle.** A line AB, Jig, 2, plate 4, cutting another line CD in E, will make the opposite angles equal, namely,... | |
| Euclides - 1814
...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... | |
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