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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. "
Elements of Geometry: Containing the Principal Propositions in the First Six ... - Página 247
por Euclid - 1789 - 272 páginas
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The geometry, by T. S. Davies. Conic sections, by Stephen Fenwick

Royal Military Academy, Woolwich - 1853
...but are not in the same direction. 9. 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. When several angles are at one point B, any one of them is expressed by three letters,...
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The Elements of geometry; or, The first six books, with the eleventh and ...

Euclides - 1855
...and unnecessary to be remembered. .IX. 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. When two straight lines meet at a point, so that if produced they would intersect...
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Mensuration of lines, areas, surfaces, and volumes

Robert Rawson - 1856
...not in the same direction." IX. A plane rectilineal angle is the \ i» inclination of two straight lines to one another, which meet together, but are not in the same straight line. NB — "When several angles are at one point B, any one of them is expressed by...
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Gradations in Euclid : books i. and ii., with an explanatory preface [&c ...

Euclides - 1858
...point of meeting, or of intersection. 9. 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 plane rectilineal angle is the opening of two straight lines from their point...
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Plane Trigonometry ...

Isaac Todhunter - 1860
...angles are measured. A plane rectilineal angle is defined by Euclid as the inclination of two straight lines to one another which meet together, but are not in the same straight line. And when a straight line standing on another makes the adjacent angles equal to...
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Euclid's Elements of Geometry: Chiefly from the Text of Dr. Simson, with ...

Robert Potts - 1860 - 361 páginas
...are not in the same straight line. IX. 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. NB If there be only one angle at a point, it may be expressed by a letter placed...
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The Projection and Calculation of the Sphere for Young Sea Officers Being a ...

S. M. Saxby - 1861 - 112 páginas
...direction." And (Book I. def. 9), " A plane rectilineal angle is the inclination of two right (or straight) lines to one another, which meet together, but are not in the same right line ;" so that, in the following figure the right Fig. 11. line AB meets the right line...
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Elementary Trigonometry: With a Collection of Examples

Thomas Percy Hudson - 1862 - 184 páginas
...definition of an angle. Euclid defines a plane rectilineal angle to be the inclination of two straight lines to one another, which meet together but are not in the same straight line. He does not in his definition take into account the direction in which this inclination...
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Euclid's Elements of geometry, books i. ii. iii. iv

Euclides - 1862
...but are not in the same direction. 9. 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. 10. When a straight line standing on another straight line, makes the adjacent...
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The elements of plane geometry; or, The first six books of Euclid, ed. by W ...

Euclides - 1863
...but are not in the same direction. IX. 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. NB—When several angles are at one point B, any one of them is expressed by three...
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