 | Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 426 pages
...only one angle at a point, it may be expressed by a letter placed at that point; as the angle at E. 10. 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... | |
 | Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 424 pages
...only one angle at a point, it may be expressed by a letter placed at that point; as the angle at E. 10. 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... | |
 | Robert Potts - 1868 - 434 pages
...the angle AB D, or DBA ; and that which is contained by DB, CB, is called the angle DBG, or CBD. I When a straight 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 which stands on the... | |
 | E. M. Reynolds - Geometry - 1868 - 172 pages
...placed between the other two. When an angle stands alone one letter only is often used, as A. When one straight 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 which stands on the... | |
 | Isaac Todhunter - Measurement - 1869 - 312 pages
...statement that a certain angle is three times another angle, or four times another angle ; and so on. 8. 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... | |
 | Euclides - 1870 - 270 pages
...degree is the 360th part of the circumference of a circle, and consequently varies with the size of the circle. 10. When a straight line standing on another...other, each of these angles is called a right angle; and the straight line which stands on the other is called a, perpendicular to it. The angle CDA being... | |
 | John Lowres - 1870 - 130 pages
...line stands on another straight line so that the adjacent angles (or those on each side of it) are equal to each other, each of these angles is called a right angle ; and the first line is said to be PERPENDICULAR to the second : as HK and ' • L M. When an angle... | |
 | William Alexander Myers - Circle-squaring - 1873 - 238 pages
...lines if produced would form two concentric circles ; *that is, having a common center, as at F. 14. When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is a right angle, and the straight line which stands on the other is... | |
 | Euclides - 1874 - 120 pages
...inclination of two straight lines to one another, which meet together, but are not in the same straight line. 10. 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... | |
 | Edward Atkins - 1874 - 426 pages
...only one angle at any given point, it may be expressed by the letter at that point, as the angle E. 10. 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... | |
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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. 
