 | Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 426 pages
...but are not in the same direction. 9. A plane rectilineal angle is the inclination of two Btraight lines to one another, which meet together, but are not in the same straight line. Note. When several angles are at ene point B, any one of them is expressed by three letters, of which... | |
 | Septimus Tebay - Measurement - 1868 - 168 pages
...the straight line between them lies wholly in that superficies. 7. A plane rectilineal angle is the inclination of two straight lines to one another,...meet together, but are not in the same straight line. TM 1 f. Thus, the angle at A is contained by the two straight lines AB, AC ; and is called the angle... | |
 | Robert Potts - 1868 - 434 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. g, NB If there be only one angle at a point, it may be expressed by a letter placed at that point,... | |
 | Isaac Todhunter - Measurement - 1869 - 312 pages
...first Three Sections we shall only consider lines and figures on a plane surface. 4. An angle is the inclination of two straight lines to one another which meet together, but are not in the same Thus the two straight lines AO, BO, which meet at O, form an angle there. The angle is not altered... | |
 | Alfred Hiley - 1871 - 184 pages
...it cannot be contained within fewer than three straight lines. X. 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. Thus the two straight lines CA and BA, meeting together at the point A, make the angle BAG, or, as... | |
 | William Alexander Myers - Circle-squaring - 1873 - 238 pages
...plane which meet together, but are not in the same direction. 22. 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. 23. A THEOREM is a truth requiring demonstration. 24. An AXIOM is a self-evident truth. 25. A PROBLEM... | |
 | Henry Major - Student teachers - 1873 - 588 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. An angle is named from three or one letters, as ABC or B. X. When a straight line standing oil another... | |
 | Euclides - 1874 - 342 pages
...plane, which meet together, but are not in the same straight line. A 9. A plane rectilineal angle is the inclination of two straight lines to one another,...straight line. NB When several angles are at one point B, either of them is expressed by three letters, of which the letter that is at the vertex of the angle... | |
 | Edward Atkins - 1874 - 428 pages
...plane, which meet together, but are not in the same direction. 9. A plane rectilineal angle is the inclination of two straight lines to one another,...meet together, but are not in the same straight line. Thus, the angle contained by the straight lines AB and EC is expressed either by ABC or CBA, and the... | |
 | John Clement P. Aldous - 1874 - 104 pages
...Miscellaneous Examples C7 CHAPTER L ANGLES AND THE MEASUREMENT OF ANGLES. 1 A plane rectilineal angle is the inclination of two straight lines to one another,...meet together, but are not in the same straight line. This is one of Euclid's Definitions, which describes the nature of the angles treated of in Plane Trigonometry.... | |
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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. 
