 | Robert Simson - Trigonometry - 1775 - 520 pages
...are not in the fame " direction." IX. A plane rectilineal angle is the inclination of two ftraight lines to one another, which meet together, but are not in the fame ftraight line. « NB Book I. B CE ' NB When feveral angles are at one point B, any one ' of them... | |
 | Euclid - 1781 - 550 pages
...are not in the fame " direction." IX. A plane rectilineal angle is- the inclination of two ftraight lines to one another, which meet together, but are not in the fame ftraight line. NB Book I. A! D CE * NB When fevcral angles are at one point B, any one of them... | |
 | Euclid - Euclid's Elements - 1789 - 296 pages
...ftill a fuperfluous condition. He defines a rectilineal angle, to be " the inclination of two ftraight lines to one another, which meet together, but are not in the fame ftraight line ." Now their not being in the fame ftraight line, is a neceflfary confequence, obvioufly... | |
 | John Playfair - Trigonometry - 1795 - 444 pages
...the meeting of other lines than ftraight lines. A pl»ne angle is faid to be ' the inclination of two lines to one another which meet together, but are not in the feme direftion.' This definition is omitted here, becaufe that the angles formed by the meeting of... | |
 | Alexander Ingram - Trigonometry - 1799 - 351 pages
...in that fupeificies. VIII. Omitted. IX. A plane reftilineal angle is the inclination of two ftraight lines to one another, which meet together, but are not in the fame ftraight line. B NB BooK T. ' NB When feveral angles are at one point B, any one * of them is... | |
 | John Playfair - Euclid's Elements - 1806 - 320 pages
...the straight line between them lies wholly in that superficies. VI. A plane rectilineal angle is the inclination of two straight lines to one another,...meet together, but are not in the same straight line. A NB ' When several angles are at one point B, any one ' of them is expressed by three letters, of... | |
 | Robert Simson - Trigonometry - 1806 - 518 pages
...plane, which meet together, but are not in the same " direction." IX. A plane rectilineal angle is the inclination of two straight lines' to one another,...meet together, but are not in the same straight line. B B C NB c When several angles are at one point B, any one of < them is expressed by three letters,... | |
 | Edward Augustus Kendall - 1811 - 466 pages
...general division of angles is, into plane, spherical, and solid. Angle, a plane, rectilineal, is the inclination of two straight lines to one another,...meet together, but are not in the same straight line. See Fig. 6. Angle, spherical, is an angle formed on the surface of a sphere by the intersection of... | |
 | 1811 - 566 pages
...definition of Euclid's first Book, in which it is affirmed that ' a plane rectilineal angle is the inclination of two straight lines to one another,...together, but are not in the same straight line.' Book IV. relates to the construction of polygons, their inscrptkm in, and circumscription about, circles.... | |
 | Edward Augustus Kendall - Encyclopedias and dictionaries - 1811 - 962 pages
...into plane, spherical, and solid. Angle, a plane, rectilineal, is the inclination of two •traight lines to one another, which meet together, but are not in the same straight line. See Fig. 6. Angle, spherical, is an angle formed on the surfac* of a sphere by the intersection of... | |
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A plane rectilineal angle is the inclination of two straight lines to one another, -which meet together, but are not in the same straight line. 
