 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.  A course of geometrical drawing - Page 2by William Schofield Binns - 1861Full view - About this book
 | Euclides - 1853 - 146 pages
...one angle at a point, it may be expressed by a letter placed at that point, as the angle at E." x. When a straight line standing on another straight...stands on the other is called a perpendicular to it. XI. An obtuse angle is that which is greater than a right angle. XII. An acute angle is that which... | |
 | Euclides - Geometry - 1853 - 176 pages
...another straight line makes the adjacent angles equal to one another, each of the angles is called a rigM angle ; and the straight line which stands on the other is called a perpendicular toit. XI. An obtuse angle is that which is greater than a right angle. XII. An acute angle is that... | |
 | Euclides - 1855 - 270 pages
...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...stands on the other is called a perpendicular to it. By borrowing the terms vertical and horizontal from the language of Physics, we may define a right... | |
 | Robert Rawson - 1856 - 178 pages
...only one angle at a point, it may be expressed by a letter placed at that point ; as the angle at E." When a straight line standing on another straight...stands on the other is called a perpendicular to it. XL An obtuse angle is that which is greater than a right angle. xn. An acute angle is that which is... | |
 | Euclides - 1856 - 168 pages
...When a straight line standing on another straight line makes the adjacent angles equal to each other, each of the angles is called a right angle, and the...straight line which stands on the other is called perpendicular. PROPOSITIONS, i. Straight lines from the same point and in the same direction coincide.... | |
 | Euclides - 1858 - 248 pages
...line standing on another straight lino makes the adjacent angles equal to each other, each of these angles is called a right angle; and the straight line...on the other is called a perpendicular to it. The angle CD A being equal to angle CDB, each of them is a right angle, and CD is a perpendicular to A... | |
 | Euclides - 1860 - 288 pages
...angle, and near to the angular point. Thus, angle DBC may be called angle n ; and ABD, angle m. 11. When a straight line standing on another straight...stands on the other is called a perpendicular to it. 12. The two adjacent angles which one straight line makes with another on the same side of it are called... | |
 | Robert Potts - Geometry, Plane - 1860 - 380 pages
...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...stands on the other is called a perpendicular to it. XL An obtuse angle is that which is greater than a right angle. XIL An acute angle is that which is... | |
 | Euclides - 1861 - 464 pages
...st. line makes the adj. ¿_s equal to each other, each of these /.s is called a rt. ¿_ ; and the st. line which stands on the other is called a perpendicular to it. Ax. 1. Things which are equal to the same thing are equal to one another. EI 2 CI 2 Dat. Quass. Pst.... | |
 | Euclides - 1862 - 140 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...stands on the other is called a perpendicular to it. 1 1 . An obtuse angle is that which is greater than a right angle. 13. A term or boundary is the extremity... | |
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