 | Euclides - 1885 - 340 σελίδες
...adjacent angles at both sides of itself equal, each of the angles is called a right angle, and the line which stands on the other is called a perpendicular to it. Hence a right angle is equal to its supplement. xv. An acute angle is one which is less than a right... | |
 | Euclid, John Casey - 1885 - 340 σελίδες
...adjacent angles at both sides of itself equal, each of the angles is called a right angle, and the line which stands on the other is called a perpendicular to it. D Hence a right angle is equal to its supplement. xv. An acute angle is one which is less than a right... | |
 | John Thornton - 1888 - 266 σελίδες
...right angle : — ' When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called...stands on the other is called a perpendicular to it.' We find it convenient for the purposes of angular measurement to divide the right angle into smaller... | |
 | Edward Mann Langley, W. Seys Phillips - 1890 - 538 σελίδες
...Prop. 9. DEF. 10. — When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called...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 σελίδες
...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 σελίδες
...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 σελίδες
...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... | |
 | Seymour Eaton - 1899 - 362 σελίδες
...standing on another straight line makes the adjacent angles equal to one another, I v/ \ GB each of these angles is called a right angle, and the straight line...stands on the other is called a perpendicular to it (Definitions). Therefore CH is a perpendicular drawn to the given straight line AB from the given point... | |
 | John Thornton - 1899 - 460 σελίδες
...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... | |
 | Euclid, Henry Sinclair Hall, Frederick Haller Stevens - 1900 - 330 σελίδες
...to one another. 10. When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called...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... | |
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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. 
