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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. "
A Treatise on Surveying, Containing the Theory and Practice: To which is ... - Page 25
by John Gummere - 1814 - 346 pages
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The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ...

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...
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The First Six Books: Together with the Eleventh and Twelfth

Euclid - 1781 - 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. A! D CE * NB When fevcral angles are at one point B, any one of them...
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Elements of Geometry: Containing the Principal Propositions in the First Six ...

Euclid - Euclid's Elements - 1789 - 272 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...
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Elements of Geometry;: Containing the First Six Books of Euclid, with Two ...

Euclid, John Playfair - Electronic book - 1795 - 400 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...
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The Elements of Euclid: Viz. the First Six Books, with the Eleventh and ...

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...
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Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - Euclid's Elements - 1806 - 311 pages
...which any two points being taken, the straight line between them lies wholly in that superficies. VI. A plane rectilineal angle is the inclination of two...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...
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The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - Trigonometry - 1806 - 518 pages
...to one another See N. " in a plane, which meet together, but are not in the same " direction." IX. A plane rectilineal angle is the inclination of two...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,...
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A Course of Mathematics ...: Designed for the Use of the Officers ..., Volume 1

Isaac Dalby - Mathematics - 1807
...two points being taken, the right line between them lies wholly ia that plane or superficies. 8. A rectilineal angle is the inclination of two straight lines to one another, which meet in a point called the angular point, as the angle C. C \ An angle is usually denoted by three letters,...
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The London Quarterly Review, Volume 4

1811
...a right line, contrary to the 9th definition of Euclid's first Book, in which it is affirmed that ' a plane rectilineal angle is the inclination of two...together, but are not in the same straight line.' Book IV. relates to the construction of polygons, their inscrptkm in, and circumscription about, circles....
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A pocket encyclopędia, or library of general knowledge, Volume 1

Edward Augustus Kendall - 1811
...most 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...
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