 | Euclides - 1877 - 58 pages
...which, any two points being taken, the straight line between them lies wholly in that superficies. 8. A plane rectilineal angle is the inclination of two...meet together but are not in the same straight line. An angle is generally expressed by three letters, the middle one of which must be the letter at the... | |
 | 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... | |
 | Āryabhaṭa - 1878 - 100 pages
...to touch one another, when their ijircumferences meet in any point, but do not cut one •ther. XV. A plane rectilineal angle is the inclination of two...meet 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... | |
 | Euclides - 1879 - 146 pages
...lines, as well as 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...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... | |
 | Moffatt and Paige - 1879 - 428 pages
...two lines to each 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...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... | |
 | Alfred Hiley - 1879 - 228 pages
...as in the case of a circle ; but it cannot be contained within. fewer than three straight lines. X. A plane rectilineal angle is the inclination of two...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... | |
 | W J. Dickinson - Geometry - 1879 - 44 pages
...respectively equal ? ' Answer him. 5. Explain clearly why the following definition is insufficient : — ' A plane rectilineal angle is the inclination of two straight lines to one another.' Define obtuse angle, isosceles triangle, rhomboid. 6. Define a plane superficies, a circle, an acute-angled... | |
 | Education - 1901 - 702 pages
...think the balance of advantage will be found to lie with Euclid. I. DEFINITION OF AN ANGLE. Euclid : " A plane rectilineal angle is the inclination of two...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... | |
 | Isaac Todhunter - Euclid's Elements - 1880 - 426 pages
...of two lines to one another in a plane, which meet together, but are not in the same direction. 9. A plane rectilineal angle is the inclination of two...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... | |
 | Education - 1900 - 1050 pages
...think the balance of advantage will be found to lie with Euclid. I. DEFINITION OF AN ANGLE. Euclid: "A plane rectilineal angle is the inclination of two...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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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. 
