 | Edward Mann Langley, W. Seys Phillips - 1890 - 538 pàgines
...for Euclid having chosen the method of Prop. 10 instead of it. See Note 2 on Prop. 9. DEF. 10. — When a straight line standing on another straight...and the straight line which stands on the other is said to be perpendicular, or at right angles, to it. The symbol for ' perpendicular 'is x r. The student... | |
 | Edward Albert Bowser - 1890 - 414 pàgines
...said to bisect the angle between the non-coincident sides BA and BE. Fig. 6 Fig. 7 0 Fig. 8 O Fig. 9 called a right angle; and the straight line which stands on the other is said to be perpendicular or at right angles to it. Thus, if the adjacent angles AOC and BOC are equal... | |
 | Euclid - 1892 - 460 pàgines
...line, standing on another straight line, makes the adjacent angles equal to one another, each of these angles is called a right angle, and the straight line...stands on the other is called a perpendicular to it. Therefore CH is a perpendicular drawn to the given straight line AB from the given point C without... | |
 | James Howard Gore - 1898 - 232 pàgines
...other. 35. When a straight line standing on another makes the adjacent angles equal to each other, f each of the angles is called a Right Angle; and the straight line which stands ou the other side is said to be perpendicular or at right angles to it. A_ Thus, if the adjacent angles... | |
 | John Thornton - 1899 - 460 pàgines
...makes the adjaG. 9.— Pendulum swinging cent angles equal to one another, each through arc /«. r .1 and the straight line which stands on the other is called a perpendicular to it." Notice that " perpendicular " does not always mean upright, but making equal angles on both or all... | |
 | Seymour Eaton - 1899 - 362 pàgines
...lines to each other in a plane, which meet, but are not in the same straight line (A). MATHEMATTCS 8. When a straight line standing on another straight line makes the adjacent angles equal, each is called a right angle (B). The line which stands upon the other is called a perpendicular to... | |
 | 1898 - 610 pàgines
...6m, is named the angle с m Ъ. — When a straight line, cm, standing on another straight line, a b. makes the adjacent angles equal to one another, each of the angles erne, cmb, is culled a right anglr; and the straight lines are said to be perpendicular to each other.... | |
 | Euclid, Henry Sinclair Hall, Frederick Haller Stevens - 1900 - 330 pàgines
...to be verticaIIy opposite. The two angles CEB, AED are also vertically opposite to one another. 10. When a straight line standing on another straight...stands on the other is called a perpendicular to it. 1 1 . An obtuse angle is an angle which is greater than a right angle. 12. An acute angle is an angle... | |
 | Joseph Battell - 1903 - 722 pàgines
...would be reasonably correct ; but in most respects not as accurate as that of Euclid, which reads : 'When a straight line standing on another straight...line makes the adjacent angles equal to one another, the angle is called a right angle ; and the straight line which stands on the other is called a perpendicular... | |
 | G. F. Burn - 1903 - 272 pàgines
...angle, and obtuse when greater than a right angle. Angle CAB or angle A = 40°, is indicated thus : When a straight line standing on another straight line makes the adjacent angles equal ' pjg. 5. to one another, each of these angles is called a right angle; and the straight line which... | |
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When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it. 
