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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 course of practical geometry for mechanics - Page 7
by William Pease - 1856
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Elements of geometry, based on Euclid, book i

Edward Atkins - 1877 - 72 pages
...another in a plane, which meet together, but are not in the same direction. 9. A plane rectilineal angle is the inclination of two straight lines to...meet together, but are not in the same straight line. NOTE. — When several angles are at one point B, any one of them ia expressed by three letters, of...
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Natural philosophy for beginners

Isaac Todhunter - 1877 - 442 pages
...most of the common terms is probably known to the reader, but we will draw attention to them. 12. An angle is the inclination of two straight lines to...meet together, but are not in the same straight line. Thus the two straight lines AO, BO, which meet at 0 form an angle there. The angle is not altered by...
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The elements of plane geometry, from the Sansk. text of Ayra Bhatta, ed. by ...

Āryabhaṭa - 1878 - 100 pages
...another, when their ijircumferences meet in any point, but do not cut one •ther. XV. A plane rectilineal angle is the inclination of two straight lines to...together, but are not in the same straight line. NB In the figure subjoined B is an angle and is thus expressed : " Angle AB 0." A BC XVI. When a straight...
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Moffatt's pupil teachers' course (ed. by T. Page). Candidates, 2nd (-4th) year

Moffatt and Paige - 1879 - 428 pages
...other in a plane, which meet together, but are not in the same straight line. 9. A plane rectilineal angle is the inclination of two straight lines to...meet together, but are not in the same straight line. ANB — When several angles are at one point, B, either of them is expressed by three letters, of which...
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Explanatory Mensuration

Alfred Hiley - 1879 - 228 pages
...circle ; but it cannot be contained within. fewer than three straight lines. X. A plane rectilineal angle is the inclination of two straight lines to...meet together, but are not in the same straight line. Thus the two straight lines CA and BA, meeting together at the point A, make the angle BAC, or, as...
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Euclid, books i. & ii., with notes, examples, and explanations, by a late ...

Euclides - 1879 - 146 pages
...that formed by two straight lines, and is not required in the first two books.] 9. A plane rectilineal angle is the inclination of two straight lines to...meet together, but are not in the same straight line. [Thus the inclination of the lines OA, OB is called the angle AOB, or BOA, or the angle at O. O Observe...
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Education, Volume 21

Education - 1900 - 1050 pages
...advantage will be found to lie with Euclid. I. DEFINITION OF AN ANGLE. Euclid: "A plane rectilineal angle is the inclination of two straight lines to...together, but are not in the same straight line." Modern writers define this concept variously. Davies : " An angle is the amount of divergence of two...
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Education, Volume 21

Education - 1901 - 702 pages
...advantage will be found to lie with Euclid. I. DEFINITION OF AN ANGLE. Euclid : " A plane rectilineal angle is the inclination of two straight lines to...together, but are not in the same straight line." Modern writers define this concept variously. Davies : " An angle is the amount of divergence of two...
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The Elements of Euclid for the Use of Schools and Colleges: With Notes, an ...

Isaac Todhunter - Euclid's Elements - 1880 - 426 pages
...another in a plane, which meet together, but are not in the same direction. 9. A plane rectilineal angle is the inclination of two straight lines to...meet together, but are not in the same straight line. Note. When several angles are at one point B, any one of them is expressed by three letters, of which...
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Class lessons on Euclid

Marianne Nops - 1882 - 278 pages
...another in a plane, which meet together but are not in the same direction.' 9. ' A plane rectilineal angle is the inclination of two straight lines to...meet together but are not in the same straight line.' Def. S includes angles formed by two curved lines, or a straight and a curved line. With these we shall...
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