 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 other is called a perpendicular to it.  Outlines of Geometry ... - Σελίδα 29των Walter Marsham Adams - 1866Πλήρης προβολή - Σχετικά με αυτό το βιβλίο
 | James Thomson (LL.D.) - 1837 - 296 σελίδες
...divergence. II. When one straight line standing on another, makes with it two angles which are equal, each of these angles is called a RIGHT ANGLE ; and the straight line which stands on the other is said to be PERPENDICULAR, Or AT RIGHT ANGLES, tO it, or tO be a PERPENDICULAR... | |
 | Euclides - 1838 - 264 σελίδες
...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 lines are said to be perpendicular to each other. IX. An obtuse angle is that which is greater than a right angle. An acute angle is that which is less... | |
 | Euclides - 1846 - 292 σελίδες
...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 other is called a perpendicular to •it (Def. 10) ; therefore CH is perpendicular... | |
 | William Somerville Orr - 1854 - 534 σελίδες
...straight line (CD) makes the adjacent angles (А В С, А В D) equal to one another, each of the angles is called a right angle ; and the straight lines are said to be perpendicular to each other. Thus the two lines, AB, CD, are perpendicular to each other. An obtuse angle is ¿hat which is greater... | |
 | Euclides - 1855 - 270 σελίδες
...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 other is called a perpendicular to it. By borrowing the terms vertical and... | |
 | William Ezra Worthen - 1857 - 650 σελίδες
...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 lines are said to be perpendicular to each other (fig. 3). An obtuse angle is that which is greater than a right angle (fig. 4). Fig. 8. Fig. 4. Fig.... | |
 | W.E. WORTHEN - 1857 - 600 σελίδες
...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 lines are said to be perpendicular to each other (fig. 3). An obtuse <mgle is that which is greater than a right angle (fig. 4). Fig. 8. Fig. 4, Fig.... | |
 | William Ezra Worthen - 1857 - 632 σελίδες
...straight line makes the adjacent angles equal to one another, each of the angles is called a rig fit angle ; and the straight lines are said to be perpendicular to each other (fig. 3). An obtuse angle is that which is greater than a right angle (fig. 4). Fig. S. Fig. 4. Fig.... | |
 | Robert Potts - 1860 - 380 σελίδες
...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 other is called a perpendicular to it. XL An obtuse angle is that which is... | |
 | Euclides - 1863 - 122 σελίδες
...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 tbo other is called a perpendicular to it —!— XI. An obtuse angle is that... | |
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